#BZOJ3561. DZY Loves Math VI
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ID: 2099
Type: RemoteJudge
1000ms
256MiB
Tried: 0
Accepted: 0
Difficulty: (None)
Uploaded By:
root
DZY Loves Math VI
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题目描述
给定正整数n,m。求
输入格式
一行两个整数n,m。
输出格式
一个整数，为答案模1000000007后的值。
5 4
424
数据范围与约定
数据规模：
1<=n,m<=500000，共有3组数据。