func_code_string: #include <bits/stdc++.h>   using namespace std;   bool isv(char x) {     if (x ==  a  || x ==  e  || x ==  i  || x ==  o  || x ==  u ) return true;     return false;   }   int main() {     ios::sync_with_stdio(0);     long long c, a, b, act;     cin >> c;     cin >> a >> b;     act = max(a, b);     --c;     while (c--) {       cin >> a >> b;       if (a <= act && b <= act)         act = max(a, b);       else if (a <= act)         act = a;       else if (b <= act)         act = b;       else {         cout <<  NO  <<   n ;         return 0;       }     }     cout <<  YES  <<   n ;     return 0;   }   