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  1. #include <algorithm>
  2. #include <cstdio>
  3. #include <cstring>
  4.  
  5. int clock_same_digit_counter(int at_least) {
  6.     int sum = 0;
  7.     char hhmm[5];
  8.  
  9.     int len = sizeof(hhmm) / sizeof(char) - 1;
  10.  
  11.     if (at_least < 2 || at_least > len) return -1;
  12.  
  13.     for (int i = 1; i <= 12; ++i) {
  14.         sprintf(hhmm, "%02d", i);
  15.         for (int j = 0; j < 60; ++j) {
  16.             sprintf(hhmm + 2, "%02d", j);
  17.             int ma = 0, counts[10] = {0};
  18.             for (int k = 0; k < len; k++) {
  19.                 ma = std::max(ma, ++counts[hhmm[k]-'0']);
  20.             }
  21.             if (ma >= at_least) {
  22.                 ++sum;
  23.             }
  24.         }
  25.     }
  26.  
  27.     return sum;
  28. }
  29.  
  30. int main(int argc, char *argv[]) {
  31.     printf("%d\n", clock_same_digit_counter(3) * 2);
  32.     return 0;
  33. }
Success #stdin #stdout 0.01s 2724KB
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Standard input is empty
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66
https://ideone.com/HhmWc
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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