C :

#include<stdio.h>

int main()
{
	int t,a,b,c;
	scanf("%d",&t);
	while(t--)
	{
		scanf("%d%d%d",&a,&b,&c);
		if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a)
			printf("good\n");
		else if(a==b||a==c||b==c)
			printf("perfect\n");
		else
			printf("just a triangle\n");
	}
	return 0;
}

C++ :

#include<stdio.h>

int main()
{
	int t,a,b,c;
	scanf("%d",&t);
	while(t--)
	{
		scanf("%d%d%d",&a,&b,&c);
		if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a)
			printf("good\n");
		else if(a==b||a==c||b==c)
			printf("perfect\n");
		else
			printf("just a triangle\n");
	}
	return 0;
}

Java :

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Scanner;

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		String[] zong = in.nextLine().split(" ");
		int start=Integer.parseInt(zong[0]);
		for(int i=0;i<start;i++){
			String[] nei = in.nextLine().split(" ");
			int[] s=new int[3];
			s[0]=Integer.parseInt(nei[0]);
			s[1]=Integer.parseInt(nei[1]);
			s[2]=Integer.parseInt(nei[2]);
			int over=check(s[0],s[1],s[2]);
			if(over==-1){
				System.out.println("good");
			}
			if(over==0){
				System.out.println("just a triangle");
			}
			if(over==1){
				System.out.println("perfect");
			}
		}
	}

	private static int check(int a, int b, int c) {
		// TODO Auto-generated method stub
		ArrayList<Integer> array = new ArrayList<Integer>();
		array.add(a);
		array.add(b);
		array.add(c);
		Collections.sort(array);
		int d=0;
		
		int s1,s2,s3;
		s1=array.get(0);
		s2=array.get(1);
		s3=array.get(2);
		if((Math.pow(s1,2)+Math.pow(s2,2))==Math.pow(s3,2)){
			d=-1;
		}
		if((s1==s2)||(s1==s3)||(s3==s2)){
			d=1;
		}
		return d;
		
	}
	}