func_code_string: #include <bits/stdc++.h>   using namespace std;   const int M = 1e5;   int main() {     int t;     cin >> t;     int f[t];     memset(f, 0, sizeof(0));     for (int i = 0; i < t; ++i) {       int x, y;       cin >> x >> y;       if (x > 0)         f[i] = 1;       else if (x < 0)         f[i] = 0;     }     int sum = 0;     for (int i = 0; i < t; ++i) {       if (f[i]) sum++;     }     if (sum == 1 || sum == t - 1 || sum == t || sum == 0)       cout <<  Yes  << endl;     else       cout <<  No  << endl;   }   