2015
05-23

# hdu 4156-egypt-计算几何-[解题报告]hoj

Problem Description
A long time ago, the Egyptians figured out that a triangle with sides of length 3, 4, and 5 had a right angle as its largest angle. You must determine if other triangles have a similar property.

Input
Input represents several test cases, followed by a line containing 0 0 0. Each test case has three positive integers, less than 30,000, denoting the lengths of the sides of a triangle.

Output
For each test case, a line containing "right" if the triangle is a right triangle, and a line containing "wrong" if the triangle is not a right triangle.

Sample Input
6 8 10
25 52 60
5 12 13
0 0 0

Sample Output
right
wrong
right

#include <iostream>
#include <algorithm>
using namespace std;

int main()
{
int a[3];
while(cin >> a[0] >> a[1] >> a[2])
{
if(a[0] == 0 && a[1] == 0 && a[2] == 0)
break;
sort(a,a+3);
if(a[0]*a[0] + a[1]*a[1] == a[2]*a[2])
cout << "right" << endl;
else
cout << "wrong" << endl;
}

return 0;
}