func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int x, y, t, neg = 0, pos = 0;     cin >> t;     while (t--) {       cin >> x >> y;       if (x < 0)         neg++;       else         pos++;     }     if (neg <= 1 || pos <= 1)       cout <<  YES  << endl;     else       cout <<  NO  << endl;     return 0;   }   