1010. Radix (25)

1 /*  2 date：2016-09-05  3 author：CheerM  4 title：Radix（25）  5   6 题目描述：  7 Given a pair of positive integers, for example, 6 and 110, can this equation 6 = 110 be true? The answer is "yes", if 6 is a decimal number and 110 is a binary number.  8   9 Now for any pair of positive integers N1 and N2, your task is to find the radix of one number while that of the other is given. 10  11 Input Specification: 12  13 Each input file contains one test case. Each case occupies a line which contains 4 positive integers: 14 N1 N2 tag radix 15 Here N1 and N2 each has no more than 10 digits. A digit is less than its radix and is chosen from the set {0-9, a-z} where 0-9 represent the decimal numbers 0-9, and a-z represent the decimal numbers 10-35. The last number "radix" is the radix of N1 if "tag" is 1, or of N2 if "tag" is 2. 16  17 Output Specification: 18  19 For each test case, print in one line the radix of the other number so that the equation N1 = N2 is true. If the equation is impossible, print "Impossible". If the solution is not unique, output the smallest possible radix. 20  21 Sample Input 1: 22 6 110 1 10 23 Sample Output 1: 24 2 25 Sample Input 2: 26 1 ab 1 2 27 Sample Output 2: 28 Impossible 29  30 解题思路：主要是进制转换，找出基底的上界下界，然后二分查找遍历可能的基底 31  32 1. 基底的下界：基底一定不能小于数字中出现的最大单位数 33 2. 基底的上届：当两个数字均不为零，且所找数字最小（==1）时，也有相等的可能，基底应该==另一个数字的10进制值 34                 e.g. 99 1 1 10 则应该上界取99， 以99为基底时  有  99（10）== 1（99） 35  36 3. 注意超时！！！！！！(仔细看题，不超过10位的digits)，不要递归 37  38 4. 注意循环边界、不重复也不要漏掉（不然会无限循环、答案错误） TAT自己挖的bug，哭着也要填完...打个草稿是多重要... 39 */ 40  41 #define _CRT_SECURE_NO_DEPRECATE 42  43 #include 
      
        44 #include 
       
         45 #include 
        
          46  47 using namespace std; 48  49 char n1[11], n2[11]; 50  51 //任意基底转10进制数 52 long long turnIntoRadix(const char* n, long long len, long long radix) { 53     long long result = 0, count = 0; 54     while (count < len) 55     { 56         int temp; 57         if (n[count] >= '0' && n[count] <= '9') temp = n[count] - '0'; 58         else temp = n[count] - 'a' + 10; 59          60         result = result * radix + temp; 61         count++; 62  63         if (result < 0) return -1; 64     } 65     return result; 66 } 67  68 //获取基底下界，即另一整数中单位最大数 69 long long getMinR(const char* n, long long len) { 70     long long count = len, maxR = 0; 71     while (count --) 72     { 73         int temp; 74         if (n[count] >= '0' && n[count] <= '9') temp = n[count] - '0'; 75         else temp = n[count] - 'a' + 10; 76  77         maxR = maxR > temp ? maxR : temp; 78     } 79     return maxR; 80 } 81  82 //遍历基底查找 83 void checkRadix(long long n1, const char* n2, long long len2, long long minR, long long maxR) { 84     if (maxR < minR) { 85         printf("Impossible\n"); 86         return; 87     } 88  89     //取中间基底二分查找 90     long long medR = minR + (maxR - minR) / 2; 91     long long result = 0; 92     bool flag = false; 93     while (minR <= maxR) 94     { 95         result = turnIntoRadix(n2, len2, medR); 96         if (result > n1 || result == -1) { 97             maxR = medR - 1; 98             medR = minR + (maxR - minR) / 2; 99         }100         else if (result == n1) {101             flag = true;102             break;103         }104         else {105             minR = medR + 1;106             medR = minR + (maxR - minR) / 2;107         }108     }109 110     if (flag) printf("%lld\n", medR);111     else printf("Impossible\n");112 113     return;114 }115 116 int main() {117     long long tag, radix, len1, len2;118     scanf("%s %s %lld %lld", n1, n2, &tag, &radix);119 120     len1 = strlen(n1), len2 = strlen(n2);121 122     long long first, second, maxR, minR;123     if (tag == 1) {124         first = turnIntoRadix(n1, len1, radix);125         maxR = first + 1;126         minR = getMinR(n2, len2) + 1;127         checkRadix(first, n2,len2, minR, maxR);128     }129     else {130         second = turnIntoRadix(n2, len2, radix);131         maxR = second + 1;132         minR = getMinR(n1, len1) + 1;133         checkRadix(second, n1, len1, minR, maxR);134     }135     136     system("pause");137     return 0;138 }

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1026. Table Tennis (30)

部分正确...待修改...

1 /*  2 date: 2016-09-06  3 author: CheerM  4 title: Table Tennis (30)  5 待修改，部分正确（19/30）  6   7 题目描述：  8 A table tennis club has N tables available to the public. The tables are numbered from 1 to N. For any pair of players, if there are some tables open when they arrive, they will be assigned to the available table with the smallest number. If all the tables are occupied, they will have to wait in a queue. It is assumed that every pair of players can play for at most 2 hours.  9  10 Your job is to count for everyone in queue their waiting time, and for each table the number of players it has served for the day. 11  12 One thing that makes this procedure a bit complicated is that the club reserves some tables for their VIP members. When a VIP table is open, the first VIP pair in the queue will have the priviledge to take it. However, if there is no VIP in the queue, the next pair of players can take it. On the other hand, if when it is the turn of a VIP pair, yet no VIP table is available, they can be assigned as any ordinary players. 13  14 Input Specification: 15  16 Each input file contains one test case. For each case, the first line contains an integer N (<=10000) - the total number of pairs of players. Then N lines follow, each contains 2 times and a VIP tag: HH:MM:SS - the arriving time, P - the playing time in minutes of a pair of players, and tag - which is 1 if they hold a VIP card, or 0 if not. It is guaranteed that the arriving time is between 08:00:00 and 21:00:00 while the club is open. It is assumed that no two customers arrives at the same time. Following the players' info, there are 2 positive integers: K (<=100) - the number of tables, and M (< K) - the number of VIP tables. The last line contains M table numbers. 17  18 Output Specification: 19  20 For each test case, first print the arriving time, serving time and the waiting time for each pair of players in the format shown by the sample. Then print in a line the number of players served by each table. Notice that the output must be listed in chronological order of the serving time. The waiting time must be rounded up to an integer minute(s). If one cannot get a table before the closing time, their information must NOT be printed. 21  22 Sample Input: 23 9 24 20:52:00 10 0 25 08:00:00 20 0 26 08:02:00 30 0 27 20:51:00 10 0 28 08:10:00 5 0 29 08:12:00 10 1 30 20:50:00 10 0 31 08:01:30 15 1 32 20:53:00 10 1 33 3 1 34 2 35 Sample Output: 36 08:00:00 08:00:00 0 37 08:01:30 08:01:30 0 38 08:02:00 08:02:00 0 39 08:12:00 08:16:30 5 40 08:10:00 08:20:00 10 41 20:50:00 20:50:00 0 42 20:51:00 20:51:00 0 43 20:52:00 20:52:00 0 44 3 3 2 45  46 */ 47  48  49 #include 
      
        50 #include 
       
         51 #include 
        
          52 #include 
         
           53  54 using namespace std; 55  56 //将数字转化为字符串时间 57 string turnIntoStr(int hh, int mm, int ss) { 58     string result = ""; 59  60     result.push_back(hh / 10 + '0'); 61     result.push_back(hh % 10 + '0'); 62     result.push_back(':'); 63     result.push_back(mm / 10 + '0'); 64     result.push_back(mm % 10 + '0'); 65     result.push_back(':'); 66     result.push_back(ss / 10 + '0'); 67     result.push_back(ss % 10 + '0'); 68  69     return result; 70 } 71  72 //时间变化 73 string addTime(const string& time, int min) { 74     //转成时间 75     int hh, mm, ss; 76     hh = (time[0] - '0') * 10 + time[1] - '0'; 77     mm = (time[3] - '0') * 10 + time[4] - '0'; 78     ss = (time[6] - '0') * 10 + time[7] - '0'; 79  80     hh = ((mm + min) / 60 + hh) % 24; 81     mm = (mm + min) % 60; 82  83     return turnIntoStr(hh, mm, ss); 84 } 85  86 typedef struct Table{ 87     Table(int sn, int st, bool v) { 88         serveNum = sn; 89         serveTime = st; 90         isVIP = v; 91     } 92     int serveNum; 93     int serveTime; 94     bool isVIP; 95 }; 96  97 typedef struct Client{ 98     Client(string& at, int ut) { 99         arriveTime = at;100         useTime = ut;101         waitTime = 0;102     }103     //到达时间104     string arriveTime;105     int useTime;106     //算秒数107     int waitTime;108 };109 110 bool compare(const Client& A,const Client& B) {111     return A.arriveTime < B.arriveTime;112 }113 114 //客人的到达时间是否超出营业时间115 bool isOverTime(const string& time, int min) {116     if (time < "08:00:00") return true;117     string result = addTime(time, min);118     if (result > "21:00:00") return true;119     return false;120 }121 122 //四舍五入123 int wtime(int waitTime) {124     return (waitTime + 30) / 60;125 }126 127 int waitForNextClient(string& now, string& next) {128     int t1[3] = { 0, 0, 0 }, t2[3] = {
    0, 0, 0};129     for (int i = 0, count = 0; i < now.size(); i++) {130         if (now[i] >= '0' && now[i] <= '9') t1[count] = t1[count] * 10 + now[i] - '0';131         else count++;132     }133     for (int i = 0, count = 0; i < now.size(); i++) {134         if (next[i] >= '0' && next[i] <= '9') t2[count] = t2[count] * 10 + next[i] - '0';135         else count++;136     }137     return (t2[0] - t1[0]) * 3600 + (t2[1] - t1[1]) * 60 + t2[2] - t1[2];138 }139 140 int main() {141     vector
          
            ordinary, vip;143 144     int t, ut, n, m;145     string str;146     bool vipflag;147     cin >> t;148     while (t--) {149         cin >> str >> ut >> vipflag;150         if (vipflag) vip.push_back(Client(str, ut * 60));151         else ordinary.push_back(Client(str, ut * 60));152     }153 154     //按到达时间把顾客排序155     sort(vip.begin(), vip.end(), compare);156     sort(ordinary.begin(), ordinary.end(), compare);157 158     //输入桌子数量、vip桌子数量159     cin >> n >> m;160     for (int i = 1; i <= n; i++) table.push_back(Table(0, 0, 0));161 162     int *vipTableMark = new int[m];163     //标注vip桌子号164     for (int i = 0; i < m; i++) {165         cin >> vipTableMark[i];166         //cout << vipTableMark[i] << endl;167         table[vipTableMark[i] - 1].isVIP = 1;168     }169 170     int ordinaryCount = 0, vipCount = 0;171     int nextArriveOrdinary = 0, nextArriveVip = 0;172     //优化，可以跳过循环的时间，无更替，或者无客人的时候173     int jumpHour = 0, jumpMinute = 0, jumpSecond = 0, minServerTime = 46800;174     //标志，记录是否下次循环无更替175     bool jump = false;176     for (int i = 8; i <= 21;) {177         for (int j = 0; j <= 59;) {178             //每秒钟，遍历一次每张桌子179             for (int s = 0; s <= 59;) {180                 string nowTime = turnIntoStr(i, j, s);181                 //遍历之后要对于每位在等待的顾客，等待时间+1182                 for (int k = ordinaryCount; k < ordinary.size(); k++) {183                     if (ordinary[k].arriveTime < nowTime) {184                         ordinary[k].waitTime += jumpHour * 3600 + jumpMinute * 60 + jumpSecond;185                     }186                     else break;187                 }188                 for (int k = vipCount; k < vip.size(); k++) {189                     if (vip[k].arriveTime < nowTime) {190                         vip[k].waitTime += jumpHour * 3600 + jumpMinute * 60 + jumpSecond;191                     }192                     else break;193                 }194                 //优化，可以不每分钟遍历一次，每次遍历记录最小的servertime值，下次直接跳转serverTime，相应的，servertime不是自减，而是减去跳转间隔195                 for (int k = 0; k < table.size(); k++) {196                     if (table[k].serveTime > 0) {197                         table[k].serveTime -= jumpHour * 3600 + jumpMinute * 60 + jumpSecond;198                     }199                     if (table[k].serveTime == 0) {200                         if (table[k].isVIP == 1) {201                             //VIP桌优先接待已经到达的VIP客户，减少排队时间202                             if (vipCount < vip.size() && vip[vipCount].arriveTime <= nowTime) {203                                 cout << vip[vipCount].arriveTime << " " << nowTime << " " << wtime(vip[vipCount].waitTime) << endl;204                                 table[k].serveNum++;205                                 table[k].serveTime = vip[vipCount].useTime > 7200 ? 7200 : vip[vipCount].useTime;//不能超过两个小时206                                 if (nextArriveVip == vipCount)nextArriveVip++;207                                 vipCount++;208                             }209                             else if (ordinaryCount < ordinary.size() && ordinary[ordinaryCount].arriveTime <= nowTime) {210                                 cout << ordinary[ordinaryCount].arriveTime << " " << nowTime << " " << wtime(ordinary[ordinaryCount].waitTime) << endl;211                                 table[k].serveNum++;212                                 table[k].serveTime = ordinary[ordinaryCount].useTime > 7200 ? 7200 : ordinary[ordinaryCount].useTime;213                                 if (ordinaryCount == nextArriveOrdinary)nextArriveOrdinary++;214                                 ordinaryCount++;215                             }216                         }217                         else {218                             //普通桌可以接受按时达到排队的VIP/非VIP客户219                             if (ordinaryCount < ordinary.size() && vipCount < vip.size() && vip[vipCount].arriveTime <= nowTime && ordinary[ordinaryCount].arriveTime >= vip[vipCount].arriveTime) {220                                 cout << vip[vipCount].arriveTime << " " << nowTime << " " << wtime(vip[vipCount].waitTime) << endl;221                                 table[k].serveNum++;222                                 table[k].serveTime = vip[vipCount].useTime > 7200 ? 7200 : vip[vipCount].useTime;223                                 if (nextArriveVip == vipCount)nextArriveVip++;224                                 vipCount++;225                             }226                             else if (ordinaryCount < ordinary.size() && vipCount < vip.size() && ordinary[ordinaryCount].arriveTime <= nowTime && ordinary[ordinaryCount].arriveTime <= vip[vipCount].arriveTime) {227                                 cout << ordinary[ordinaryCount].arriveTime << " " << nowTime << " " << wtime(ordinary[ordinaryCount].waitTime) << endl;228                                 table[k].serveNum++;229                                 table[k].serveTime = ordinary[ordinaryCount].useTime > 7200 ? 7200 : ordinary[ordinaryCount].useTime;230                                 if (ordinaryCount == nextArriveOrdinary)nextArriveOrdinary++;231                                 ordinaryCount++;232                             }233                         }234                     }235                     if (table[k].serveTime > 0) minServerTime = minServerTime > table[k].serveTime ? table[k].serveTime : minServerTime;236                 }237 238                 //即此处要等待客人239                 if ((nextArriveVip < vip.size() || nextArriveOrdinary < ordinary.size())) {240                     string nextClient;241                     //只剩vip客人242                     if (nextArriveVip < vip.size() && nextArriveOrdinary >= ordinary.size()) {243                         nextClient = vip[nextArriveVip].arriveTime;244                         if (minServerTime > waitForNextClient(nowTime, nextClient))nextArriveVip++;245                     }246                     //只剩普通客人247                     else if (nextArriveVip >= vip.size() && nextArriveOrdinary < ordinary.size()) {248                         nextClient = ordinary[nextArriveOrdinary].arriveTime;249                         if (minServerTime > waitForNextClient(nowTime, nextClient))nextArriveOrdinary++;250                     }251                     //队列里两种客人都还有252                     else if (nextArriveVip < vip.size() && nextArriveOrdinary < ordinary.size()) {253                         nextClient = ordinary[nextArriveOrdinary].arriveTime > vip[nextArriveVip].arriveTime ? vip[nextArriveVip].arriveTime : ordinary[nextArriveOrdinary].arriveTime;254                         if (minServerTime > waitForNextClient(nowTime, nextClient) && ordinary[nextArriveOrdinary].arriveTime < vip[nextArriveVip].arriveTime)nextArriveOrdinary++;255                         else if (minServerTime > waitForNextClient(nowTime, nextClient) && ordinary[nextArriveOrdinary].arriveTime >= vip[nextArriveVip].arriveTime)nextArriveVip++;256                     }257                     else {258                         jump = true;259                     }260                     minServerTime = minServerTime > waitForNextClient(nowTime, nextClient) ? waitForNextClient(nowTime, nextClient) : minServerTime;261                 }262 263                 if (jump)break;264 265                 jumpSecond = minServerTime % 60;266                 jumpMinute = (minServerTime / 60) % 60;267                 jumpHour = minServerTime / 3600;268 269                 minServerTime = 46800;270                 int st = s + jumpSecond;271                 int jt = j + jumpMinute;272                 int it = i + jumpHour;273 274                 s = st % 60;275                 j = (jt + st / 60) % 60;276                 i = (jt + st / 60) / 60 + it;277                 278 279                 //营业时间到，终止营业280                 if (turnIntoStr(i, j, s) >= "21:00:00") {281                     jump = true;282                     break;283                 }284             }285             if (jump)break;286         }287         if (jump)break;288     }289 290     for (int k = 0; k < table.size(); k++) {291         if (k == 0) cout << table[k].serveNum;292         else cout << " " << table[k].serveNum;293     }294     cout << endl;295 296     system("pause");297     return 0;298 }
          
          
            table;142     vector

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1039. Course List for Student (25)

用map思路简单，但是student人数一多，就会超时

1 /* 2 date：2016-09-09 3 author：CheerM 4 title：1039.Course List for Student (25) 5 state：部分完成， 待修改 6 */ 7  8  9 #include 
      
       10 #include 
       
        11 #include 
        12 #include 
         
          13 #include 
          
           14 15 using namespace std;16 17 int main() {18     //学生19     map

> student;20 //学生总人数，课程总数，某门课程的ID，选修某门课程的学生人数21 int studentNum, coursesNum, courseID, enrollNum;22 //23 string studentName;24 25 cin >> studentNum >> coursesNum;26 27 for (int i = 0; i < coursesNum; i++) {28 cin >> courseID >> enrollNum;29 for (int j = 0; j < enrollNum; j++) {30 cin >> studentName;31 student[studentName].push_back(courseID);32 }33 }34 35 string printName;36 for (int i = 0; i < studentNum; i++) {37 cin >> printName;38 sort(student[printName].begin(), student[printName].end());39 cout << printName << " " << student[printName].size();40 for (int i = 0; i < student[printName].size(); i++)41 cout << " " << student[printName].at(i);42 cout << endl;43 }44 system("pause");45 return 0;46 }

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1060. Are They Equal (25)

1 /*  2 date:2016-09-10  3 author:CheerM  4 title:1060. Are They Equal (25)  5 state:通过  6   7 边界调节比较细，N有可能大于数字的长度  8 */  9  10 #include 
      
        11 #include 
       
         12 #include 
        
          13 #include 
         
           14  15 using namespace std; 16  17 string turnIntoStr(int a) { 18     string str = ""; 19     if (a == 0) { 20         str.push_back('0'); 21         return str; 22     } 23     else if (a < 0) a = a + 1; 24  25     int temp1 = abs(a); 26     int temp2; 27     while (temp1) { 28         temp2 = temp1 % 10; 29         temp1 /= 10; 30         str.push_back('0' + temp2); 31     } 32     if (a < 0) str.push_back('-'); 33     reverse(str.begin(), str.end()); 34     return str; 35 } 36  37 int main() { 38     string str1, str2; 39     string ss1 = "0.", ss2 = "0."; 40     //记录小数点下标 41     int dot1 = -1, dot2 = -1; 42     //记录第一个非零数字的下标 43     int index1 = -1, index2 = -1; 44  45     int n; 46     cin >> n >> str1 >> str2; 47  48     int count = 0; 49     for (int i = 0; i < str1.size() || count < n; i++) { 50         if (count < n && i < str1.size()) { 51             if (str1[i] != '.' && str1[i] != '0' && index1 == -1) index1 = i; 52             else if (str1[i] == '.' && dot1 == -1) dot1 = i; 53              54             if (str1[i] != '.' && index1 != -1) { 55                 ss1.push_back(str1[i]); 56                 count++; 57             } 58         } 59         else if (count < n && i >= str1.size()) { 60             ss1.push_back('0'); 61             count++; 62         } 63         else if (count >= n && i < str1.size()) { 64             //继续寻找dot和index的值 65             if (index1 != -1 && dot1 != -1)break; 66  67             if (str1[i] != '.' && str1[i] != '0' && index1 == -1) index1 = i; 68             else if (str1[i] == '.' && dot1 == -1) dot1 = i; 69         } 70     } 71     if (dot1 == -1) dot1 = str1.size(); 72     if (index1 == -1) index1 = dot1 = str1.size(); 73  74     count = 0; 75     for (int i = 0; i < str2.size() || count < n; i++) { 76         if (count < n && i < str2.size()) { 77             if (str2[i] != '.' && str2[i] != '0' && index2 == -1) index2 = i; 78             else if (str2[i] == '.' && dot2 == -1) dot2 = i; 79  80             if (str2[i] != '.' && index2 != -1) { 81                 ss2.push_back(str2[i]); 82                 count++; 83             } 84         } 85         else if (count < n && i >= str2.size()) { 86             ss2.push_back('0'); 87             count++; 88         } 89         else if (count >= n && i < str2.size()) { 90             //继续寻找dot和index的值 91             if (index2 != 0 && dot2 != 0)break; 92  93             if (str2[i] != '.' && str2[i] != '0' && index2 == -1) index2 = i; 94             else if (str2[i] == '.' && dot2 == -1) dot2 = i; 95         } 96     } 97     if (dot2 == -1) dot2 = str2.size(); 98     //0.0000 == 0.0 = 0 99     if (index2 == -1) index2 = dot2 = str2.size();100 101     ss1 = ss1 + "*10^" + turnIntoStr(dot1 - index1);102     ss2 = ss2 + "*10^" + turnIntoStr(dot2 - index2);103 104     if (ss1 == ss2) {105         cout << "YES";106         cout << " " << ss1 << endl;107     }108     else {109         cout << "NO";110         cout << " " << ss1 << " " << ss2 << endl;111     }112         113     system("pause");114     return 0;115 }

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1055. The World's Richest (25)

1 /* 2 date:2016-09-10 3 author:CheerM     4 title:1055. The World's Richest (25) 5 state:通过 6  7 内存限制不大，但是VS编译爆栈（默认栈空间为1M，开100000结构体数组约4M，肯定要爆栈了），要手动调整设置 8 空间换时间，并且要稍微剪枝（每次查询，最多输出100位，即每个年龄段只保留前100位有效即可） 9 */10 11 #include 
      
       12 #include 
       
        13 #include 
        
         14 15 using namespace std;16 17 struct Person{18     string name;19     int age;20     int worth;21 };22 23 bool compare(Person A, Person B) {24     return (A.worth > B.worth) || (A.worth == B.worth && A.age < B.age) || (A.worth == B.worth && A.age == B.age && A.name < B.name);25 }26 27 int main() {28     29     int personNum, questionNum;30     Person richestMan[100000];31     int ageRecord[201], filter[100000], count = 0;32     for (int i = 0; i < 201; i++) ageRecord[i] = 0;33 34     cin >> personNum >> questionNum;35     36     //记录人物信息37     string name_;38     int age_, worth_;39     for (int i = 0; i < personNum; i++) {40         cin >> name_ >> age_ >> worth_;41         richestMan[i].name = name_;42         richestMan[i].age = age_;43         richestMan[i].worth = worth_;44     }45 46     //排序47     sort(richestMan, richestMan + personNum, compare);48 49     //剪枝，每个age都只取前100位richer，就可以满足查询需求50     for (int i = 0; i < personNum; i++) {51         if (ageRecord[richestMan[i].age] < 100) {52             ageRecord[richestMan[i].age] ++;53             //记录有效的person的index54             filter[count++] = i;55         }56     }57 58     //查询richest persons59     int richerNum, ageMin, ageMax;60     int index = 0;61     for (int i = 0; i < questionNum; i++) {62         cin >> richerNum >> ageMin >> ageMax;63         cout << "Case #" << i + 1 << ":\n";64         for (int j = 0; j < count; j++) {65             int temp = filter[j];66             if (richestMan[temp].age >= ageMin && richestMan[temp].age <= ageMax && index < richerNum) {67                 cout << richestMan[temp].name << " " << richestMan[temp].age << " " << richestMan[temp].worth << endl;68                 index++;69             }70             else{71                 continue;72             }73 74             if (index == 0)break;75         }76         if (index == 0)77             cout << "None" << endl;78         else79             index = 0;80     }81     82     system("pause");83     return 0;84 }

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转载于:https://www.cnblogs.com/cheermyang/p/5844241.html

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