10101번 삼각형 외우기

https://www.acmicpc.net/problem/10101

#include <iostream>
#include <queue>
#include <stack>
#include <cstdio>
#include <vector>
#include <cstring>
#include <string>
#include <math.h>
#include <algorithm>
#include <map>
 
using namespace std;
 
int main(void)
{
    int a, b, c;
 
    scanf("%d %d %d", &a, &b, &c);
 
    if (a == b && b == c && c == a) printf("Equilateral\n");
    else if (a + b + c == 180 && (a == b || b == c || c == a)) printf("Isosceles");
    else if (a + b + c == 180 && (a != b && b != c && c != a)) printf("Scalene");
    else if (a + b + c != 180)printf("Error\n");
 
    return 0;
}