题解 | #牛牛学数列4#
牛牛学数列4
https://ac.nowcoder.com/acm/problem/22159
#include <bits/stdc++.h> using namespace std; int main() { int n; cin >> n;
int sum = 0;
for( int i = 1 ; i <= n ; i ++ )
{
for( int j = i ; j <= n ; j ++ )
{
sum += i;
}
}
cout << sum << endl;
return 0;
}
