题解 | 金币
金币
https://www.nowcoder.com/practice/8f71f5670e6a45118d24d13868a2da9e
#include <stdio.h>
int main() {
int a,b=1,c=0;
scanf("%d",&a);
while(a>0)
{if(a>=b){
c=c+b*b;
}else c=c+b*a;
a=a-b;
b++;
}
printf("%d",c);
return 0;
}