代码如下

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a[5]={0};
	for(int i=1;i<=3;i++){
		cin>>a[i];
	}
	sort(a+1,a+4);
	if(a[1]+a[2]<a[3]){
		cout<<"Not triangle";
		return 0;
	}
	if(a[1]*a[1]+a[2]*a[2]==a[3]*a[3])cout<<"Right triangle"<<endl;
	else if(a[3]*a[3]>a[2]*a[2]+a[1]*a[1])cout<<"Obtuse triangle"<<endl;
	else if(a[3]*a[3]<a[2]*a[2]+a[1]*a[1])cout<<"Acute triangle"<<endl;
	if(a[1]==a[2]&&a[2]==a[3])cout<<"Equilateral triangle"<<endl;
	if(a[1]==a[2]||a[2]==a[3]||a[3]==a[1])cout<<"Isosceles triangle"<<endl;
	
    return 0;
}
"""