摘要:
#include <bits/stdc++.h> #define LL long long #define Pi acos(-1.0) #define INF 2147483646 #define eps 1e-9 #define MS 9 #define mod 9901 using namesp 阅读全文
摘要:
A. Donut Shops There are two rival donut shops. The first shop sells donuts at retail: each donut costs a dollars. The second shop sells donuts only i 阅读全文