Q11494: Queen

原文

http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=2489

中譯

http://luckycat.kshs.kh.edu.tw/homework/q11494.htm

#include "stdio.h"

int main()
{
  int x1,x2,y1,y2;
  while( 1 )
  {
 scanf(" %d %d %d %d",&x1,&y1,&x2,&y2);
 if( x1 == 0 && x2 == 0 && y1 == 0 && y2 == 0 )
   break;
 if( x1 == x2 && y1 == y2)
   printf("0\n");
 else if( (x1 - x2)*(x1 - x2) == (y1 - y2)*(y1 - y2) || x1 - x2 == 0 || y1 - y2 == 0)
   printf("1\n");
 else
   printf("2\n");
  }
  return 0;
}