#include <iostream> #include <numeric> #include <vector> using namespace std; int main() { int t; cin >> t; vector<int> v; // 多次循环公用一个vector,减小内存开销 while (t--) { int n; cin >> n; v.resize(n); for (int i = 0; i < n; i++) cin >> v[i]; cout << accumula...