func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 3e5 + 9;   int a[N], b[N];   int32_t main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     int t;     cin >> t;     while (t--) {       int n;       cin >> n;       for (int i = 1; i <= n; i++) cin >> a[i];       for (int i = 1; i <= n; i++) cin >> b[i];       int ok = 1;       if (a[1] != b[1]) ok = 0;       map<int, int> cnt;       cnt[a[1]]++;       for (int i = 2; i <= n; i++) {         if (a[i] < b[i] && cnt[1] == 0) ok = 0;         if (a[i] > b[i] && cnt[-1] == 0) ok = 0;         cnt[a[i]] = 1;       }       if (ok)         cout <<  YES n ;       else         cout <<  NO n ;     }     return 0;   }   