On Oct 27, 8:21 am, "MOHIT ...." <[email protected]> wrote:
> @ruturaj : but for that hash table you have to know range??
Nope we dont need the range.

#include<map>

map <int, int> hash;

for(int i=0;i<n;i++)
if(hash[m-a[i]] > 0)count++;hash[a[i]]++;

does the trick.

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