2024团体程序设计天梯赛L1-102 兰州牛肉面

#include<iostream>
#include<stdio.h>
#include<iomanip>
using namespace std;
int n, a[105], c, d;
double p[105], ans;
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0),cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) cin >> p[i];
    while(1) {
        cin >> c >> d;
        if (!c) break;
        a[c]+=d;
    }
    for (int i = 1; i <= n; i++) {
        cout << a[i] << endl;
        ans += a[i] * p[i];
    }
    cout << fixed << setprecision(2) << ans <<endl;
}