## Adjacency Hatred codechef solution – An array is called lovely if the sum of absolute differences of each adjacent pair of elements is odd; formally, the array SS of size mm is lovely if ∑m−1i=1∑i=1m−1 |Si−Si+1||Si−Si+1| is odd.

An array is called lovely if the sum of absolute differences of each adjacent pair of elements is odd; formally, the array SS of size mm is lovely if ∑m−1i=1∑i=1m−1 |Si−Si+1||Si−Si+1| is odd. You are given an array AA of NN integers. You need to reorder the array in any manner such that the array becomes lovely. If there is no reordering operation that makes the array lovely, output -1. Input Format The first … Read more

## Zebra Crossing codechef solution – There’s a zebra crossing appearing in the middle of nowhere with NN blocks in it. The colors of the zebra crossing is represented by a binary string SS, where SiSi is 1 if the ii-th block from the left is white, and 0 if the block is black.

There’s a zebra crossing appearing in the middle of nowhere with NN blocks in it. The colors of the zebra crossing is represented by a binary string SS, where SiSi is 1 if the ii-th block from the left is white, and 0 if the block is black. Chef really wants to play with the zebra crossing. Although the given zebra crossing might not have alternate black and white blocks, … Read more

## Fake Swaps codechef solution – You are given two binary strings SS and PP. You need to convert SS into PP using the following operation any number of times (possibly zero)

You are given two binary strings SS and PP. You need to convert SS into PP using the following operation any number of times (possibly zero): Pick three binary values XX, YY, and ZZ, such that at least one of them is equal to 11 and at least one of them is equal to 00. Then, pick three distinct indices ii, jj, and kk, and assign Si=XSi=X, Sj=YSj=Y, and Sk=ZSk=Z. Determine whether it’s possible to convert SS into PP. Input Format The … Read more

## Chef and Pairwise Distances codechef solution – Chef has an array AA with NN elements. He wants to find NN points P1,…,PNP1,…,PN with integer coordinates on the 2D coordinate plane such that, for all pairs of indices ii and jj (1≤i

Chef has an array AA with NN elements. He wants to find NN points P1,…,PNP1,…,PN with integer coordinates on the 2D coordinate plane such that, for all pairs of indices ii and jj (1≤i<j≤N1≤i<j≤N), the Manhattan distance from PiPi to PjPj is Ai+AjAi+Aj. Help him find any NN points satisfying the condition, or state that no such points exist. As a reminder, the Manhattan distance between the points (x1,y1)(x1,y1) and (x2,y2)(x2,y2) is defined as |x1−x2|+|y1−y2||x1−x2|+|y1−y2|. Input Format The first line contains an integer TT denoting the number of … Read more

## [Solution] Chess Kings Chasing Game solution codechef

Chess Kings Chasing Game solution codechef There’s an N×NN×N grid where each cell of the grid contains a positive integer. Let Vi,jVi,j be the positive integer on the cell positioned ii-th rows from the top and jj-th columns from the left. Initially, Alice is at position (Ax,Ay)(Ax,Ay) and Bob is at (Bx,By)(Bx,By). Both players can move like a chess king on the grid: one step horizontally, vertically or diagonally. … Read more

## [Solution] Half Sequence solution codechef

Half Sequence solution codechef Chef has an array AA of size NN. Chef wants to choose any subsequence of size exactly ⌈N2⌉⌈N2⌉ from the array such that GCD of all the elements in that sequence must be 22. Chef names such a kind of sequence as a half-sequence. Help Chef to find whether he would be able to select any half-sequence in the given array. As a reminder, … Read more

## [Solution] Chef and Pairwise Distances solution codechef

Chef and Pairwise Distances solution codechef Chef has an array AA with NN elements. He wants to find NN points P1,…,PNP1,…,PN with integer coordinates on the 2D coordinate plane such that, for all pairs of indices ii and jj (1≤i<j≤N1≤i<j≤N), the Manhattan distance from PiPi to PjPj is Ai+AjAi+Aj. Help him find any NN points satisfying the condition, or state that no such points exist. As a reminder, the Manhattan distance between the points (x1,y1)(x1,y1) and (x2,y2)(x2,y2) is defined as |x1−x2|+|y1−y2||x1−x2|+|y1−y2|. Input Format The first line … Read more

## [Solution] Fake Swaps solution codechef

Fake Swaps solution codechef You are given two binary strings SS and PP. You need to convert SS into PP using the following operation any number of times (possibly zero): Pick three binary values XX, YY, and ZZ, such that at least one of them is equal to 11 and at least one of them is equal to 00. Then, pick three distinct indices ii, jj, and kk, and assign Si=XSi=X, Sj=YSj=Y, and Sk=ZSk=Z. Determine whether it’s possible to … Read more

## [Solution] Zebra Crossing solution codechef

Zebra Crossing solution codechef . There’s a zebra crossing appearing in the middle of nowhere with NN blocks in it. The colors of the zebra crossing is represented by a binary string SS, where SiSi is 1 if the ii-th block from the left is white, and 0 if the block is black. Chef really wants to play with the zebra crossing. Although the given zebra crossing might not have … Read more

## [Solution] Adjacency Hatred solution codechef

Adjacency Hatred solution codechef . An array is called lovely if the sum of absolute differences of each adjacent pair of elements is odd; formally, the array SS of size mm is lovely if ∑m−1i=1∑i=1m−1 |Si−Si+1||Si−Si+1| is odd. You are given an array AA of NN integers. You need to reorder the array in any manner such that the array becomes lovely. If there is no reordering operation that makes the array lovely, … Read more