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Each pair should be sorted i.e the first value should be less than or equals to the second value. Return the list of pairs sorted in non-decreasing order of their first value. In case if two pairs have the same first value, the pair with a smaller second value should come first.
The first line of input contains two space-separated integers N and S, denoting the size of the input array and the value of S. The second and last line of input contains N space-separated integers, denoting the elements of the input array: arr[i] where 0 <= i < N.
Print C lines, each line contains one pair i.e two space-separated integers, where C denotes the count of pairs having sum equals to given value S.
1 <= N <= 10^5 -10^5 <= A[i] <= 10^5 -2*10^5 <= S <= 2*10^5 Time Limit: 1 sec
5 5 1 2 3 4 5
1 4 2 3
5 0 2 -3 3 3 -2
-3 3 -3 3 -2 2