题解 | N个数之和

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