HDU2147 - kiki's game 【巴什博弈】

Recently kiki has nothing to do. While she is bored, an idea appears in his mind, she just playes the checkerboard game.The size of the chesserboard is n*m.First of all, a coin is placed in the top right corner(1,m). Each time one people can move the coin into the left, the underneath or the left-underneath blank space.The person who can't make a move will lose the game. kiki plays it with ZZ.The game always starts with kiki. If both play perfectly, who will win the game?

Input

Input contains multiple test cases. Each line contains two integer n, m (0<n,m<=2000). The input is terminated when n=0 and m=0.

Output

If kiki wins the game printf "Wonderful!", else "What a pity!".

Sample Input

5 3
5 4
6 6
0 0

Sample Output

What a pity!
Wonderful!
Wonderful!

思路：因为行列分别要走m-1和n-1步，所以要保证至少m和n其中有一个是2的倍数，这样才能保证赢

#include<cstdio>

int main( )
{
    int n,m;
    while(scanf("%d%d",&n,&m)&&(n!=0||m!=0))
    {
        if(n%2==0||m%2==0)
            printf("Wonderful!\n");
        else
            printf("What a pity!\n");
    }
    return 0;
}