摘要:
A - T-shirt #include <bits/stdc++.h> using namespace std; int32_t main(){ double a , b , c , x; cin >> a >> b >> c >> x; if( x <= a ) cout << "1.00000 阅读全文
摘要:
首先矩阵快速幂模板 ```cpp struct matrix { static constexpr int mod = 1e9 + 7; int x, y; vector> v; matrix() {} matrix(int x, int y) : x(x), y(y) { v = vector>( 阅读全文