func_code_string: #include <bits/stdc++.h>   using namespace std;   char st[8][20] = { err ,       monday ,  tuesday ,   wednesday ,                      thursday ,  friday ,  saturday ,  sunday };   int main() {     char s1[20], s2[20];     scanf(  %s %s , s1, s2);     int t1 = 0, t2 = 0;     for (int i = 1; i <= 7; i++)       if (strcmp(s1, st[i]) == 0) {         t1 = i;         break;       }     for (int i = 1; i <= 7; i++)       if (strcmp(s2, st[i]) == 0) {         t2 = i;         break;       }     bool flag = false;     if (t1 == t2) flag = true;     int tmp = t1 + 2;     if (tmp > 7) tmp -= 7;     if (tmp == t2) flag = true;     tmp = t1 + 3;     if (tmp > 7) tmp -= 7;     if (tmp == t2) flag = true;     puts(flag ?  YES  :  NO );     return 0;   }   