C. Foe Pairs 题目连接: http://www.codeforces.com/contest/652/problem/C Description You are given a permutation p of length n. Also you are given m foe pairs (ai, bi) (1 ≤ ai, bi ≤ n, ai ≠ bi). Your task is to count the number of different intervals (x, y…
A. Gabriel and Caterpillar 题目连接: http://www.codeforces.com/contest/652/problem/A Description The 9-th grade student Gabriel noticed a caterpillar on a tree when walking around in a forest after the classes. The caterpillar was on the height h1 cm fro…
A Treasure Hunt 注意负数和0的特殊处理.. 水题.. 然而又被Hack了 吗的智障 #include<bits/stdc++.h> using namespace std; int main() { int sa,sb,da,db,x,y; scanf("%d%d%d%d%d%d",&sa,&sb,&da,&db,&x,&y); sa=da-sa;sb=db-sb; if(sa<0)sa*=-1; if(…
D. Nested Segments 题目连接: http://www.codeforces.com/contest/652/problem/D Description You are given n segments on a line. There are no ends of some segments that coincide. For each segment find the number of segments it contains. Input The first line…
B. z-sort 题目连接: http://www.codeforces.com/contest/652/problem/B Description A student of z-school found a kind of sorting called z-sort. The array a with n elements are z-sorted if two conditions hold: ai ≥ ai - 1 for all even i, ai ≤ ai - 1 for all…
任意门:http://codeforces.com/contest/652/problem/D D. Nested Segments time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given n segments on a line. There are no ends of some segments th…
A. Chores time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Luba has to do n chores today. i-th chore takes ai units of time to complete. It is guaranteed that for every the conditionai ≥ a…
D. Nested Segments time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given n segments on a line. There are no ends of some segments that coincide. For each segment find the number of…
B. z-sort time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output A student of z-school found a kind of sorting called z-sort. The array a with n elements are z-sorted if two conditions hold: ai ≥ …
这场比赛没有打,后来补了一下,第五题数位dp好不容易才搞出来(我太菜啊). 比赛传送门:http://codeforces.com/contest/1073 A. Diverse Substring 题意:给你个字符串,让你找一个子串满足任意一个字符的个数不超过其他字符的总和,输出yes或no表示否存在,如果存在输出任意一个. 这题只要找两个不同的相邻字符,因为两个字符各一个都不超过其他字符的总和,如果字符串只由一个字符组成或长度等于一才会不存在. 代码如下: #include <iostrea…
Educational Codeforces Round 63 (Rated for Div. 2)题解 题目链接 A. Reverse a Substring 给出一个字符串,现在可以对这个字符串进行一次翻转,问是否存在一种方案,可以使得翻转后字符串的字典序可以变小. 这个很简单,贪心下就行了. 代码如下: Code #include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 3e5…
Educational Codeforces Round 65 (Rated for Div. 2)题解 题目链接 A. Telephone Number 水题,代码如下: Code #include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 2e5 + 5; int a[N] ; int n, T; char s[N] ; int main() { cin >> T; whil…
Educational Codeforces Round 41 (Rated for Div. 2) E. Tufurama (CDQ分治 求 二维点数) time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output One day Polycarp decided to rewatch his absolute favourite epi…
[Educational Codeforces Round 16]E. Generate a String 试题描述 zscoder wants to generate an input file for some programming competition problem. His input is a string consisting of n letters 'a'. He is too lazy to write a generator so he will manually ge…
[Educational Codeforces Round 16]D. Two Arithmetic Progressions 试题描述 You are given two arithmetic progressions: a1k + b1 and a2l + b2. Find the number of integers x such that L ≤ x ≤ R andx = a1k' + b1 = a2l' + b2, for some integers k', l' ≥ 0. 输入 Th…
[Educational Codeforces Round 16]C. Magic Odd Square 试题描述 Find an n × n matrix with different numbers from 1 to n2, so the sum in each row, column and both main diagonals are odd. 输入 The only line contains odd integer n (1 ≤ n ≤ 49). 输出 Print n lines…
