A. Pashmak and Garden
time limit per test
memory limit per test
input
output
Pashmak has fallen in love with an attractive girl called Parmida since one year ago...
Today, Pashmak set up a meeting with his partner in a romantic garden. Unfortunately, Pashmak has forgotten where the garden is. But he remembers that the garden looks like a square with sides parallel to the coordinate axes. He also remembers that there is exactly one tree on each vertex of the square. Now, Pashmak knows the position of only two of the trees. Help him to find the position of two remaining ones.
Input
x1, y1, x2, y2 ( - 100 ≤ x1, y1, x2, y2 integers, where x1 and y1 are coordinates of the first tree and x2 and y2
Output
-1. Otherwise print four space-separated integers x3, y3, x4, y4
x3, y3, x4, y4 must be in the range ( - 1000 ≤ x3, y3, x4, y4.
Examples
input
0 0 0 1
output
1 0 1 1
input
0 0 1 1
output
0 1 1 0
input
0 0 1 2
output
-1
题意：给出正方形的两个点的坐标，求剩下的两个坐标，不存在的话，输出-1.
#include<stdio.h>
#include<math.h>
#include<stdlib.h>
int main()
{
int x1,y1,x2,y2;
scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
if(x1==x2)
printf("%d %d %d %d\n",x1+y2-y1,y1,x1+y2-y1,y2);
else if(y1==y2)
{
int x=abs(x1-x2);
printf("%d %d %d %d\n",x1,y1+x,x2,y2+x);
}
else if(x2-x1==y2-y1)
printf("%d %d %d %d\n",x1,y2,x2,y1);
else if(x2-x1==y1-y2)
printf("%d %d %d %d\n",x1,y2,x2,y1);
else
printf("-1\n");
return 0;
}
