OJ Board

Yo,
I check all in/out but I do not know why is WA

#include <cstdio>
#include <vector>

using namespace std;

const int MX = 300;

bool v[MX];
vector <int> gr[MX];
int kolor[MX];

int n,m,a,b,c,wynik;

void clear()
{
for(int i=0;i<MX;i++)
{
v[i] = false;
gr[i].clear();
kolor[i] = 3;
}
wynik ...