Color it Time Limit: 20000/10000 MS (Java/Others) Memory Limit: 132768/132768 K (Java/Others) Problem Description Do you like painting? Little D doesn't like painting, especially messy color paintings. Now Little B is painting. To prevent him from dr…
problem 线段树优化建图,拓扑,没了. #include <bits/stdc++.h> #define ls(x) ch[x][0] #define rs(x) ch[x][1] #define rep(i , j , k) for(int i = j ; i <= k ; i ++) #define Rep(i , j , k) for(int i = j ; i >= k ; i --) using namespace std ; using ll = long lon…
Cows Time Limit: 3000MS Memory Limit: 65536K Description Farmer John's cows have discovered that the clover growing along the ridge of the hill (which we can think of as a one-dimensional number line) in his field is particularly good. Farmer John ha…