哪里错了 c++ 求助

P2669 [NOIP2015 普及组] 金币

Iamzzr @ 2021-07-15 10:07:48


#include <iostream>
#include <cmath>
using namespace std;

int main(){
    int n, i, s=0, a, ans;
    cin>>n;
    for(i=1; ; i++){
        s+=i;
        if(s>=n) break;
    }
 for(a=1; a<=i; a++){
    ans += pow(a, 2);
 }
 ans = ans - (s-n) * i;
 cout<<ans;
    return 0;
}

by wzmzmhk @ 2021-07-16 15:03:21

@Iamzzr Where is ans = 0?


by Klaus_Game_Bot @ 2021-12-11 16:59:18

试试这个 (最好不要抄代码)

#include<iostream>
using namespace std;
int main(){
    int k,coin=0,day=0;
    cin>>k;
    for(int i=1;;i++){
        for(int j=1;j<=i;j++){
            coin += i;day++;
            if(day==k){
                cout<<coin<<endl;
                return 0;
            }
        }
    }
    return 0;
}

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