51 Nod 1556計算(默慈金數的應用)

#include<bits/stdc++.h> #define mod 1000000007 using namespace std; typedef long long ll; ll moni[1000005]; ll exgcd(ll a, ll b, ll &x, ll &y) {     if (b == 0)     {         x = 1;         y = 0;    

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