func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       int n, a[100001], b[100001], flag = 1;       cin >> n;       vector<int> v(2, 0);       for (int i = 0; i < n; i++) cin >> a[i];       for (int j = 0; j < n; j++) cin >> b[j];       for (int i = 0; i < n; i++) {         if (a[i] < b[i] && v[1] != 1) {           flag = 0;           break;         } else if (a[i] > b[i] && v[0] != -1) {           flag = 0;           break;         }         if (a[i] == 1) v[1] = 1;         if (a[i] == -1) v[0] = -1;       }       if (flag == 0)         cout <<  NO n ;       else         cout <<  YES n ;     }   }   