func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a, b, c = 0, n, t, i, j, flag = 0, sum, f;     string s, s1, s2;     cin >> t;     while (t--) {       cin >> n;       c = 0, sum = 0, flag = 0, f = 0;       int ara[n], ara1[n];       for (i = 0; i < n; i++) {         cin >> ara[i];       }       for (i = 0; i < n; i++) {         cin >> ara1[i];       }       for (i = 0; i < n; i++) {         if (ara[i] != ara1[i]) {           c = (ara1[i] - ara[i]);           flag = 1;         }         if (flag) break;       }       for (i = 0; i < n; i++) {         if (ara[i] == ara1[i])           sum++;         else if (ara[i] < ara1[i] && f == 0) {           if (ara[i] + c == ara1[i]) sum++;           if (ara[i + 1] == ara1[i + 1]) f = 1;         }       }       if (sum == n)         cout <<  YES               <<   n ;       else         cout <<  NO               <<   n ;     }     return 0;   }   