A-AtCoderLine赛时整活想写异或版本的swap写错了还WA了一发。不过现在会写了：x^=y^=x^=y点击查看代码#include<cstdio>#include<algorithm>usingnamespacestd;intmain(){ intn,x,y,z; scanf("%d%d%d%d",&n,&x,&y,&z); if(x>y)swap(x,y); p