题目链接:http://codeforces.com/problemset/problem/549/C C. The Game Of Parity time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There are n cities in Westeros. The i-th city is inhabited by ai pe…
There are n cities in Westeros. The i-th city is inhabited by ai people. Daenerys and Stannis play the following game: in one single move, a player chooses a certain town and burns it to the ground. Thus all its residents, sadly, die. Stannis starts…
下面是题解,做的不好.下一步的目标是rating涨到 1800,没打过几次cf A. Face Detection Author: Monyura One should iterate through each 2x2 square and check if it is possible to rearrange letters in such way they they form the word "face". It could be done i.e. by sorting al…
A. Face Detection Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/549/problem/A Description The developers of Looksery have to write an efficient algorithm that detects faces on a picture. Unfortunately, they are currently…
B. Looksery Party Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/549/problem/B Description The Looksery company, consisting of n staff members, is planning another big party. Every employee has his phone number and the pho…
D. Haar Features Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/549/problem/D Description The first algorithm for detecting a face on the image working in realtime was developed by Paul Viola and Michael Jones in 2001. A p…
H. Degenerate Matrix Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/549/problem/H Description The determinant of a matrix 2 × 2 is defined as follows: A matrix is called degenerate if its determinant is equal to zero. The…
F - Yura and Developers 第一次知道单调栈搞出来的区间也能启发式合并... 你把它想想成一个树的形式, 可以发现确实可以启发式合并. #include<bits/stdc++.h> #define LL long long #define fi first #define se second #define mk make_pair #define PII pair<int, int> #define PLI pair<LL, int> #defi…
The determinant of a matrix 2 × 2 is defined as follows: A matrix is called degenerate if its determinant is equal to zero. The norm ||A|| of a matrix A is defined as a maximum of absolute values of its elements. You are given a matrix . Consider any…
The first algorithm for detecting a face on the image working in realtime was developed by Paul Viola and Michael Jones in 2001. A part of the algorithm is a procedure that computes Haar features. As part of this task, we consider a simplified model…
