为什么过不了啊，只AC了两个样例。。。

#include<bits/stdc++.h>
using namespace std;
int a[4];
int main(){
	for(int i=1;i<=3;i++){
		cin>>a[i];
	}
	sort(a+1,a+3);
	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<<"Acute triangle"<<endl;
	}
	if(a[1]*a[1]+a[2]*a[2]==a[3]*a[3]){
		cout<<"Right triangle"<<endl;
	}
	if(a[1]*a[1]+a[2]*a[2]<a[3]*a[3]){
		cout<<"Obtuse triangle"<<endl;
	}
	if(a[1]==a[2]){
		cout<<"Isosceles triangle"<<endl;
	}
	if(a[1]==a[2] && a[2]==a[3]){
		cout<<"Equilateral triangle"<<endl;
	}
	return 0;
}