题解 | 多组_一维数组_T组形式

#include <iostream>
#include <vector>
using namespace std;
int main() {
   int t;
   cin >> t;
   int n;
   for (int j = 0; j < t; j++)
   {
      cin >> n;
      vector <int> a (n);
      long long int sum = 0;
    for (int i = 0; i < n; i++)
    {
      cin >> a[i];
      sum += a[i];
    }
    cout << sum << endl;
   }
}