2980: 循环入门-计算平方和

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:6 Solved:6

Description

输入正整数n,计算1² + 2² + ... + n²。

Input

输入正整数n

Output

输出1² + 2² + ... + n²的值

Sample Input Copy

3

Sample Output Copy

14