func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, m, dp[25][1100000], ans = 1e9;   char num[25][100005];   int main() {     cin >> n >> m;     for (int i = 1; i <= n; ++i) scanf( %s , num[i] + 1);     for (int i = 1; i <= m; ++i) {       int t = 0;       for (int j = 1; j <= n; ++j) t = t * 2 + num[j][i] -  0 ;       ++dp[0][t];     }     for (int i = 1; i <= n; ++i)       for (int j = 0; j < 1 << n; ++j) {         for (int k = 1; k < 1 << n; k <<= 1)           dp[i][j] = dp[i][j] + dp[i - 1][j ^ k];         if (i >= 2) dp[i][j] = dp[i][j] + (i - 2 - n) * dp[i - 2][j];         dp[i][j] /= i;       }     for (int i = 1; i < 1 << n; ++i) {       int t = 0;       for (int j = 0; j <= n; ++j) t += min(j, n - j) * dp[j][i];       ans = min(ans, t);     }     cout << ans << endl;     return 0;   }   