给你一个整数NNN,求有多少0,1,2...2N−10,1,2...2N-10,1,2...2N−1(2N2N2N个数)的排列PPP,满足:
对于任意i(0<=i<=2N−1)i(0<=i<=2N-1)i(0<=i<=2N−1),有N2<=i2+Pi2<=(2N)2N^2<=i^2+P_{i}^2<=(2N)^2N2<=i2+Pi2<=(2N)2
输出答案对MMM取模的结果(MMM是输入的)
使用您的 gxyz 通用账户