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**HackerEarth ( Problem B) Pikachu vs Team Meowstic and Helping Hand problem solution**Pikachu loves battling with other Pokemon. This time he has a team of N Meowstic to fight, ith of which has strength ai. He wants to fight with all of them K times. Team Meowstic came to know about this and now they have devised a strategy to battle against the mighty Pikachu.All the N Meowstic stand in a straight line numbered from 1 to N. Before every round of battle, they simultaneously use a move, called Helping Hand. It changes the attacking power of Team Meowstic as follows:

The attacking power of first Meowstic remains ai.

The attacking power of remaining Meowstic changes as ai = ai | ai - 1 where 2 <= i <= N and A|B represents the bitwise OR of A and B

For example, if the current attacking powers are [2,1,4,6,3], after using the Helping Hand, the powers change to [2,1|2,4|1,6|4,3|6], or [2,3,5,6,7].

Help Pikachu by finding the attacking powers of all Meowstic when he fights each of them for the last time, that is, for the Kth round.

## HackerEarth ( Problem B ) Pikachu vs Team Meowstic and Helping Hand problem solution.

`#include <bits/stdc++.h>`

using namespace std;

int main(){

int N,K;

cin>>N>>K;

vector<int>x(N);

for(int i=0;i<N;i++){

cin>>x[i];

}

vector<int>last_set(30,INT_MIN);

vector<int>ans(N);

for(int i=0;i<N;i++){

for(int j=0;j<30;j++){

if((x[i]>>j)&1)last_set[j]=i;

if(i<=K+last_set[j])ans[i]|=(1<<j);

}

}

for(auto i:ans)cout<<i<<" ";

}

### Second solution

`n,k = map(int, raw_input().split())`

arr = map(int, raw_input().split())

ans = [0 for __ in xrange(r)]

for b in xrange(30):

ds = -1

for i in xrange(n):

if arr[i]&1: ds = i+k

arr[i] >>= 1

ans[i] |= (i<=ds)<<b

print " ".join(map(str, ans))

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