问题标题: 酷町堂：4337

here

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<string>
#include<iomanip>
#include<cstring>
#include<sstream>
using namespace std;
struct Stu{
    int x,y,z;
    long long sum(){
        return x*y*z;   
    }
}a[11111];
bool cmp(Stu x,Stu y){
    return x.sum()<y.sum();
}
int main(){
    //freopen("gift.in","r",stdin);
    //freopen("gift.out","w",stdout);
    int n,q,p,o,z,cnt=0,i=0;
    cin>>n>>q>>p>>o;
    z=p*q*o;
    for(int i=0;i<n;i++){
        cin>>a[i].x>>a[i].y>>a[i].z;
    }
    while(z>0){
        z-=a[i].sum();
        if(z>0) i++;
    }
    cout<<i;
    //fclose(stdin);
    //fclose(stdout);
    return 0;
}

?????