1177: 求m到n的和

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:68 Solved:25

Description

输入两个整数m,n(m<n),求m到n之间整数相加的结果

Input

整数m,n

Output

m到n之间整数相加的结果

Sample Input Copy

3 5

Sample Output Copy

12