func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     long long n, k;     string s;     cin >> k;     vector<long long> cnt(10, 0);     for (long long i = 0; i < 4; i++) {       cin >> s;       for (long long j = 0; s[j]; j++) {         if (s[j] >=  0  && s[j] <=  9 ) cnt[s[j] -  0 ]++;       }     }     for (long long i = 0; i < 10; i++) {       if (cnt[i] > 2 * k) {         cout <<  NO ;         return;       }     }     cout <<  YES ;   }   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long long t = 1, n, a, b, m;     while (t--) solve();     return 0;   }   