604A - Uncowed Forces

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798A - Mike and palindrome

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                                                             798A  -   . Mike and palindrome              memory limit per test 256 megabytes input standard input output standard output Mike has a string  s  consisting of only lowercase English letters. He wants to  change exactly one  character from the string so that the resulting one is a palindrome. A palindrome is a string that reads the same backward as forward, for example strings " z ", " aaa ", " aba ", " abccba " are palindromes, but strings " codeforces ", " reality ", " ab " are not. Input The first and single line contains string  s  ( 1 ≤ | s | ≤ 15 ). Output Print " YES " (without quotes) if Mike can change  exactly  one character so that the resulting string is palindrome or " NO " (wi...
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1041A. Heist solution

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#include <iostream> #include <algorithm> using namespace std ; int main () { long int n ; cin >> n ;   long long arr [ n ]; for ( int j = 0 ; j < n ; j ++){ cin >> arr [ j ];}   sort ( arr , arr + n );   int b = arr [ 0 ];   int l = arr [ n - 1 ];   int x = 0 ;   for ( int i = b ; i <= l ; i ++) {   x ++; }   cout << x - n ;   return 0 ; }
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1096A Find Divisible codeforces

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Problem link Solution O(1) #include <stdio.h> #include <iostream> using namespace std ; int main () { long int l , r ; int t ; cin >> t ;   long int x = l , y = r ; while ( t --) { scanf ( "%ld" ,& l ); scanf ( "%ld" ,& r ); y = r ; int mod =( r % l ); cout << l << " " << r - mod << endl ;   mod = 0 ;     } return 0 ;}
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