1103: 奇数和

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:779 Solved:102

Description

问题:读入奇数a1,an, 求a1+a2+……an的和,其中a1,a2……an是a1至an的连续奇数。
数据规模 1<= n <=9999

Input

1 9

Output

25

Sample Input Copy


Sample Output Copy


Source/Category