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

这是哪儿错了？