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Educational Codeforces Round 63 (Rated for Div. 2)C - Alarm Clocks Everywhere

Ivan is going to sleep now and wants to set his alarm clock. There will be many necessary events tomorrow, the i-th of them will start during the xi-t...

2019-04-23

0 464

Educational Codeforces Round 63 (Rated for Div. 2) Game with Telephone Numbers B

A telephone number is a sequence of exactly 11 digits such that its first digit is 8. Vasya and Petya are playing a game. Initially they have a stri...

2019-04-23

0 501

Educational Codeforces Round 63 (Rated for Div. 2) Reverse a Substring A

You are given a string s consisting of n lowercase Latin letters. Let's define a substring as a contiguous subsegment of a string. For example, &quo...

2019-04-23

0 539

B. Make Them Equal

time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a sequence a1,a2,…...

2019-04-17

0 669

A. Restoring Three Numbers

time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Polycarp has guessed three positi...

2019-04-17

0 518