不知道为什么把；改成，就对了（看了眼题解发现要改成，

Unaccepted_Error @ 2022-10-08 16:43:19

#include <bits/stdc++.h>
using namespace std;
int main(){
    int k,n = 1,m = 0;
    cin >> k;
    for(int i = 1;i <= k;i ++)
        k -= i,m += n * n,n ++;
    cout << m + k * n;
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
int main(){
    int k,n = 1,m = 0;
    cin >> k;
    for(int i = 1;i <= k;i ++)
        k -= i;
        m += n * n;
        n ++;
    cout << m + k * n;
    return 0;
}

by 鏡音リン @ 2022-10-08 16:44:45

您需要大括号

by WaltVBAlston @ 2022-10-08 16:45:06

@mengwangjianning 你如果要换行的话for循环就要用括号把你想在括号内执行的语句括起来，否则默认只循环for下面第一行的内容。

,的作用是允许你在同一行执行多个语句

by WaltVBAlston @ 2022-10-08 16:45:22

@鏡音リン rin楼下

by kets4eki @ 2022-10-08 16:46:06

大括号是个好东西

by itisover @ 2022-10-08 16:46:11

@WaltVBAlston WaltVBAlston 楼下

by WaltVBAlston @ 2022-10-08 16:46:48

@S11EDG S11EDG楼下

by 鏡音リン @ 2022-10-08 16:47:31

@WaltVBAlston WaltVBAlston楼下

by itisover @ 2022-10-08 16:48:25

@lyqqqqq 紫杉！！！！

by a2lyaXNhbWUgbWFyaXNh @ 2022-10-08 16:49:15

楼nm下

by Unaccepted_Error @ 2022-10-08 16:52:12

楼下（）