传送门 蒟蒻我关系式没有找出来. 直接模拟递推过程好了. 代码 #include <cstdio> #define N 21 int a, n, m, x, y; int up[N][2], down[N][2], tot[N][2]; int main() { int i; scanf("%d %d %d %d", &a, &n, &m, &x); up[1][0] = up[2][1] = down[2][1] = tot[1][0] =…
题目链接: http://codeforces.com/problemset/problem/353/D?mobile=true H. Queue time limit per test 1 secondmemory limit per test 256 megabytes 问题描述 There are n schoolchildren, boys and girls, lined up in the school canteen in front of the bun stall. The b…
Description The short story titled Coconuts, by Ben Ames Williams, appeared in the Saturday Evening Post on October 9, 1926. The story tells about five men and a monkey who were shipwrecked on an island. They spent the first night gathering coconuts.…