OJ Board

I receive WA, I'm using Dijkstra and after I verify who was visited and no have airport.

The code is here:

#include <stdio.h>
#include <string.h>
#define MAXV 2020
const int INF = 0x3F3F3F3F;

int g[MAXV][MAXV];//mat
char air[MAXV];
int pred[MAXV];
int passou[MAXV];
int custo[MAXV];
int n;

int ...