先求出最小的两边，再进行之后的比较。

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

int main() {
	int a,b,c; cin>>a>>b>>c;
	
//	if(a>b){ int t=a; a=b; b=t; }
	if(a>c){ int t=a; a=c; c=t; }
	if(b>c){ int t=b; b=c; c=t; }
	// a<=b<=c    ----   a<=c, b<=c
	if(a+b > c){
		if(a*a + b*b == c*c) cout<<"zhijiao";
		if(a*a + b*b < c*c) cout<<"dunjiao";
		if(a*a + b*b > c*c) cout<<"ruijiao";
	}else cout<<"no";
	return 0;
}