hdu 1730 Northcott Game

//Time 0ms, Memory 228K

#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
int main()
{
    int t,j,n,m,ans;
    while(scanf("%d%d",&n,&m)!=EOF)
    {
        ans=0;
        for(int i=0;i<n;i++)
        {
            scanf("%d%d",&t,&j);
            m=abs(t-j)-1;
            ans^=m;
        }
        if(ans) printf("I WIN!\n");
        else printf("BAD LUCK!\n");
    }
    return 0;
}