func_code_string: #include <bits/stdc++.h>   using namespace std;   long long a[8][8], n, m, u, v, k = INT_MAX;   int32_t main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     ;     cin >> n >> m;     for (long long i = 0; i < m; i++) {       cin >> u >> v;       a[u][v] = 1;       a[v][u] = 1;     }     if (n <= 6)       cout << m <<   n ;     else {       for (long long i = 1; i <= 7; i++) {         for (long long j = i + 1; j <= 7; j++) {           long long c = 0;           for (long long l = 1; l <= 7; l++)             if (a[i][l] == 1 && a[j][l] == 1) ++c;           k = min(k, c);         }       }       cout << m - k <<   n ;     }     return 0;   }   