(C++) - 백준(BOJ) 5073번 : 삼각형과 세 변

#include <iostream>
#include <algorithm>
using namespace std;
int triangle[3];
 
int main() {
    while (1)
    {
        for (int i = 0; i < 3; i++)
        {
            cin >> triangle[i];
        }
        if (triangle[0] == 0 && triangle[0] == triangle[1] && triangle[0] == triangle[2])
        {
            break;
        }
        sort(triangle, triangle + 3);//오름차순으로 정렬
        if (triangle[2] >= triangle[1] + triangle[0])
        {
            cout << "Invalid" << '\n';
        }
        else if (triangle[0] != triangle[1] && triangle[1] != triangle[2] && triangle[0] != triangle[2])
        {
            cout << "Scalene" << '\n';
        }
        else
        {
            if (triangle[0] == triangle[1] && triangle[1] == triangle[2])
            {
                cout << "Equilateral" << '\n';
            }
            else
                cout << "Isosceles" << '\n';
        } 
    }
 
}