func_code_string: #include <bits/stdc++.h>   using namespace std;   double tick() {     static clock_t oldt, newt = clock();     double diff = 1.0 * (newt - oldt) / CLOCKS_PER_SEC;     oldt = newt;     return diff;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     long long a[4][4] = {0};     long long k;     cin >> k;     char c;     std::map<long long, long long> mp;     for (long long i = 0LL; i < (4); i++)       for (long long j = 0LL; j < (4); j++) {         cin >> c;         if (c !=  . ) mp[c -  0 ]++;       }     bool flag = true;     for (auto a : mp)       if (a.second > (2 * k)) {         flag = false;         break;       }     if (flag)       cout <<  YES ;     else       cout <<  NO ;     return 0;   }   