C++ :

#include <iostream>
#include <iomanip>
using namespace std;

int main(){
    int a,b,c;
    cin>>a>>b>>c;
    if(a+b>c&&b+c>a&&c+a>b){
    	if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a){
    		cout<<"zhijiao";
		}else if(a*a+b*b<c*c||a*a+c*c<b*b||b*b+c*c<a*a){
			cout<<"dunjiao";
		}else{
			cout<<"ruijiao";
		}
	}else{
		cout<<"no";
	}
}

Python :

a,b,c=map(int,input().split())
if a+b<=c or a+c<=b or b+c<=a:
    print('no')
if a+b>c and a+c>b and b+c>a:
    if a*a+b*b==c*c or a*a+c*c==b*b or b*b+c*c==a*a:
        print('zhijiao')
        
    elif a*a+b*b>c*c and a*a+c*c>b*b and b*b+c*c>a*a:
        print('ruijiao')

    elif a*a+b*b<c*c or a*a+c*c<b*b or b*b+c*c<a*a:
        print('dunjiao')