#include <iostream>
using namespace std;
int kain(){
    long long side1,side2,side3;
    if(!(cin>>side1>>side2>>side3))return 0;
    if ((side1+side2>side3)&&
        (side1+side3>side2)&&
        (side2+side3>side1)){
        cout<<"Invalid triangle"<<endl;
    }else{
        cout<<"Invalid triangle"<<endl;
    }
    return 0;
}