Authur_gyc

A题 honoka和格点三角形 纸上画一画，即可推出公式。 这我存在计算重复的，要去重。 #include <bits/stdc++.h> using namespace std; typedef long long ll; const ll mod = 1e9 + 7; int main() { ll n, m; scanf("%lld %lld", &...

题目 http://acm.hdu.edu.cn/showproblem.php?pid=4565 HDU 4565 A sequence S n is defined as: Where a, b, n, m are positive integers.┌x┐is the ceil of x. For example, ┌3.14┐=4. You are to calculate S n. 　　...

题目 Apple Trees In the beginning God created the heaven and the earth, the next five days God created the light, the water, the sky, the land, the trees and the living creatures, and on the sixth day h...