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i am getting WA... can't find the reason... pls help me with my code ... need some test case....

#include<iostream>
#include<bits/stdc++.h>

using namespace std;

long long int dis[2000];
bool visited[2000];

struct node
{
int u;
long long int w;
node(int a, long long int b)
{
u=a;w=b ...