func_code_string: #include <bits/stdc++.h>   using namespace std;   char x[100100];   long x2[100100];   long mes[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};   long wr = 0;   long res, cur, repsmax = -1;   long reps = 0;   long tmp1, tmp2, tmp3;   string s1;   int compare(const void *a, const void *b) { return (*(long *)a - *(long *)b); }   long check(long z) {     if ((isdigit(x[z])) && (isdigit(x[z + 1])) && (isdigit(x[z + 3])) &&         (isdigit(x[z + 4])) && (isdigit(x[z + 6])) && (isdigit(x[z + 7])) &&         (isdigit(x[z + 8])) && (isdigit(x[z + 9]))) {       if ((x[z + 2] == x[z + 5]) && (x[z + 2] ==  - )) {         tmp1 =             ((long)(x[z]) - (long)( 0 )) * 10 + ((long)(x[z + 1]) - (long)( 0 ));         tmp2 = ((long)(x[z + 3]) - (long)( 0 )) * 10 +                ((long)(x[z + 4]) - (long)( 0 ));         tmp3 = ((long)(x[z + 6]) - (long)( 0 )) * 1000 +                ((long)(x[z + 7]) - (long)( 0 )) * 100 +                (((long)(x[z + 8]) - (long)( 0 )) * 10) +                ((long)(x[z + 9]) - (long)( 0 ));         if ((tmp2 <= 12) && (tmp3 <= 2015) && (tmp3 >= 2013)) {           if ((tmp1 <= mes[tmp2]) && (tmp2 != 0) && (tmp1 != 0)) {             x2[wr++] = tmp1 + tmp2 * 100 + tmp3 * 10000;           }         }       }     }     if ((!isdigit(x[z + 9])) && (x[z + 9] !=  - )) {       return -2;     }   }   int main(int argc, char *argv[]) {     scanf( %s , &x);     long j = 0;     while (check(j++) > -2) {     }     qsort(x2, wr - 1, sizeof(long), compare);     cur = x2[0];     for (long j = 0; j < wr; j++) {       if (cur == x2[j]) {         reps++;       } else {         if (reps > repsmax) {           repsmax = reps;           res = cur;         }         cur = x2[j];         reps = 1;       }     }     if (reps > repsmax) {       repsmax = reps;       res = cur;     }     cur = x2[j];     reps = 1;     ldiv_t divresult1;     divresult1 = ldiv(res, 100);     if (divresult1.rem < 10) {       cout <<  0 ;     }     cout << divresult1.rem <<  - ;     ldiv_t divresult2;     divresult2 = ldiv(res, 10000);     if (((divresult2.rem - divresult1.rem) / 100) < 10) {       cout <<  0 ;     }     cout << (divresult2.rem - divresult1.rem) / 100 <<  - ;     ldiv_t divresult3;     divresult3 = ldiv(res, 100000000);     cout << (divresult3.rem - divresult2.rem) / 10000;     return EXIT_SUCCESS;   }   