sicily 1422 Table Tennis 大水

//又一道水题呀 矩形 球在上面45度反弹 从A出发最先到达哪个端点#include <iostream>#include <cstdio>using namespace std;int gcd( int a,int b ){return b?gcd(b,a%b):a;}int main(){int a, b;while( scanf("%d%d",&a,&b) != EOF ){int c = gcd( a, b );int k1 = b / c, k2 = a / c;int result = k1 + k2 - 2;if( k1 % 2 && k2 % 2 ) printf("C ");else if( k1 % 2 && ! (k2%2) ) printf("B ");else if( !(k1%2) && k2 % 2 ) printf("D ");else printf("A ");printf("%d/n",result);}return 0;}