HDU_1730 Northcott Game(博弈)

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#define MAX 1010

using namespace std;

int N,M;
int sum;
int res;
int main()
{
//freopen("in.txt","r",stdin);
while( scanf("%d%d",&N,&M) != EOF ){
int a,b;
res = 0;
for( int i = 0; i < N; i++ ){
scanf("%d%d",&a,&b);
res ^= abs(a-b)-1;
}
if( res == 0 ){
printf("BAD LUCK!\n");
}
else{
printf("I WIN!\n");
}
}
return 0;
}