【题解】【上海】【三角形的分类】

#include <bits/stdc++.h>
using namespace std;
int a, b, c;
int main(){
	cin >> a >> b >> c;
	if (a < b) swap(a, b);
	if (b < c) swap(b, c);
	if (a < b) swap(a, b);
	//将abc从大到小排序，方便判断
	if (a + b + c != 180) printf("Error");
	else if (a == 60 && b == 60 && c == 60)
		printf("Equilateral");
	else if (a == 90 && b == c)
		printf("Isosceles right");
	else if (a == b || a == c || b == c)
		printf("Isosceles");
	else if (a == 90)
		printf("Right");
	else
		printf("Scalene");
	return 0;
}