func_code_string: #include <bits/stdc++.h>   using namespace std;   int mas[21][21];   int n, m;   inline bool checkarr() {     for (int i = 0; i < n; i++) {       int wrongs = 0;       for (int j = 0; j < m; j++) {         if (mas[i][j] != j + 1) wrongs++;         if (wrongs > 2) return false;       }     }     return true;   }   inline void swapa(int a, int b) {     for (int j = 0; j < n; j++) {       int t = mas[j][a];       mas[j][a] = mas[j][b];       mas[j][b] = t;     }   }   int main() {     cin >> n >> m;     int i, j;     for (i = 0; i < n; i++) {       for (j = 0; j < m; j++) {         cin >> mas[i][j];       }     }     if (checkarr()) {       cout <<  YES ;       return 0;     }     for (i = 0; i < m; i++) {       for (j = i + 1; j < m; j++) {         swapa(i, j);         if (checkarr()) {           cout <<  YES ;           return 0;         }         swapa(i, j);       }     }     cout <<  NO ;     return 0;   }   