求大神，为什么只是90分？？？

P2669 [NOIP2015 普及组] 金币

123sun123 @ 2018-02-28 14:30:04

include<iostream>

using namespace std; int main() { for( int n;cin>>n; ) { int i=1,sum=0,m; int mon=0; for(i=1;i<n;i++) { sum=sum+i;

     if((n-sum)<i)
     {
         m=i; break;
        }
 }
 int j;
 for(j=1;j<=m;j++)
 {
     mon=mon+j*j;
 }
 cout<<(mon+j*(n-sum));

} }

by 夢·壹生所愛 @ 2018-02-28 16:07:14

或许是循环没加=？

by 阔耐滴大纸张 @ 2018-02-28 16:19:02

见代码

#include<bits/stdc++.h>
using namespace std;
long long money,n,i,sy;
int main()
{
    cin>>n;
    while(n>=sy)
    {
        i++;
        money+=i*i;
        sy+=i;
    }
    cout<<money-(sy-n)*i;
    return 0;
}

by 阔耐滴大纸张 @ 2018-02-28 16:19:06

@123sun123

by 123sun123 @ 2018-02-28 18:03:52

@lovelausanneforever 谢谢

by 123sun123 @ 2018-02-28 18:04:00

@阔耐滴大纸张。。。