func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, m, l, r, ar[110], ubah;   int main() {     cin >> n >> m;     for (int i = 1; i <= m; i++) {       cin >> l >> r;       ar[l]++;       ar[r + 1]--;     }     for (int i = 1; i <= n; i++) {       ubah += ar[i];       if (ubah != 1) {         cout << i <<     << ubah <<   n ;         return 0;       }     }     cout <<  OK n ;     return 0;   }   