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wave.cpp
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wave.cpp
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/*
Given an array of integers, sort the array into a wave like array and return it,
In other words, arrange the elements into a sequence such that a1 >= a2 <= a3 >= a4 <= a5.....
Example
Given [1, 2, 3, 4]
One possible answer : [2, 1, 4, 3]
Another possible answer : [4, 1, 3, 2]
NOTE : If there are multiple answers possible, return the one thats
*/
vector<int> wave(vector<int> &A) {
// Do not write main() function.
// Do not read input, instead use the arguments to the function.
// Do not print the output, instead return values as specified
// Still have a doubt. Checkout www.interviewbit.com/pages/sample_codes/ for more details
vector<int> output(A);
sort(output.begin(), output.end());
int tmp;
for (int i = 0; i < output.size()-1; i=i+2) {
tmp = output[i] ;
output[i] = output[i+1];
output[i+1] = tmp;
}
return output;
}