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;}