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;
}