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getting wrong answer.. :-? . if someone could help,it would be great..thanks in advance

#include <iostream>
#include <utility>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstdio>
#define sqr(x) ((x)*(x))
#define max 500000
#define maxnode 1005

using namespace std;
typedef ...