func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long n;     cin >> n;     long long x, y;     long long a = 0, d = 0;     for (long long i = 0; i < n; i++) {       cin >> x >> y;       if (x < 0) {         a++;       } else         d++;     }     if (a <= 1) {       cout <<  Yes  << endl;     } else if (d <= 1) {       cout <<  Yes  << endl;     } else {       cout <<  No  << endl;     }   }   