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Thak you. Now it's working.

Try to input
3 3
1 3
1 2
3 1
I think that the result is incorrect.

The program returns me 1. I think that there is a mistake in one of the cycles. But I cant find where.

#include<iostream>
#include<vector>
#include<queue.h>

#define NMAX 1024

using...