摘要：
Time limit3000 msMemory limit32768 kBThere are a bunch of stones on the beach; Stone color is white or black. Little Sheep has a magic... 阅读全文
摘要：
方法一：int tmp = 0; tmp = b; b = a; a = tmp; 方法二：a = a+b;b = a-b;a = a-b;方法三：a ^= b ^= a^= b;方法四：a = a+b-(b=a); 阅读全文