D. Dreamoon and Binary time limit per test 2 seconds memory limit per test 512 megabytes input standard input output standard output Dreamoon saw a large integer x written on the ground and wants to print its binary form out. Dreamoon has accomplishe…
C. Dreamoon and Strings time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Dreamoon has a string s and a pattern string p. He first removes exactly x characters from s obtaining string s' as a…
Tetrahedron time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a tetrahedron. Let's mark its vertices with letters A, B, C and D correspondingly. An ant is standing in the verte…
#include<bits/stdc++.h>using namespace std;const long long mod=998244353;int n;int a[100007];long long dp[100007][207][3];//第i位值为j时k是否成立,k=0,i<i-1,k=1,i==i-1,k=2,i>i-1 int main(){ scanf("%d",&n); for(int i=1;i<=n;i++) …
传送门:http://codeforces.com/contest/1092/problem/F F. Tree with Maximum Cost time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a tree consisting exactly of nn vertices. Tree is a…
B. Pasha Maximizes time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Pasha has a positive integer a without leading zeroes. Today he decided that the number is too small and he should make it…
D. Valid Sets time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output As you know, an undirected connected graph with n nodes and n - 1 edges is called a tree. You are given an integer d and a tree…
Educational Codeforces Round 63 (Rated for Div. 2) D. Beautiful Array time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given an array aa consisting of nn integers. Beauty of array i…
D. Fedor and Essay time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output After you had helped Fedor to find friends in the «Call of Soldiers 3» game, he stopped studying completely. Today, the E…
F. Economic Difficulties An electrical grid in Berland palaces consists of 2 grids: main and reserve. Wires in palaces are made of expensive material, so selling some of them would be a good idea! Each grid (main and reserve) has a head node (its num…
链接:http://codeforces.com/contest/437/problem/A A. The Child and Homework time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Once upon a time a child got a test consisting of multiple-choice qu…
http://codeforces.com/contest/426/problem/B B. Sereja and Mirroring time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Let's assume that we are given a matrix b of size x × y, let's determine…
NN is an experienced internet user and that means he spends a lot of time on the social media. Once he found the following image on the Net, which asked him to compare the sizes of inner circles: It turned out that the circles are equal. NN was very…
C. Watchmen time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Watchmen are in a danger and Doctor Manhattan together with his friend Daniel Dreiberg should warn them as soon as possible. The…
Codeforces Round #485 (Div. 2) F. AND Graph 题目连接: http://codeforces.com/contest/987/problem/F Description You are given a set of size $m$ with integer elements between $0$ and $2^{n}-1$ inclusive. Let's build an undirected graph on these integers in…
Codeforces Round #486 (Div. 3) F. Rain and Umbrellas 题目连接: http://codeforces.com/group/T0ITBvoeEx/contest/988/problem/E Description Polycarp lives on a coordinate line at the point x=0. He goes to his friend that lives at the point x=a. Polycarp can…
