Description给定n,m,求 模10^9+7的值。Input仅一行,两个整数n,m。Output仅一行答案。Sample Input100000 1000000000 Sample Output857275582 数据规模: 1<=n<=10^5,1<=m<=10^9,本题共4组数据。HintSourceBy Jc 鸣谢杜教