#include <stdio.h> main()//不是mian() { int x,y; scanf("%d%d",&x,&y);// if(x>y) printf("%d",x-y);// else printf("%d",y-x);// }
#include <stdio.h> main() { int x,y; scanf("%d%d",&x,&y); if(x>y) printf("%d",x-y); else printf("%d",y-x); }