// editor2
#include<iostream>
using namespace std;
int main{
    long long side1,side2,side3;
    cin>>side1>>side2>>side3;
    if(side1+side2>side3&&side1+side3>side2&&side2+side3>side1){
        cout<<"Valid triangle";
    }
    else{
        cout<<"Invalid triangle";
    }
    return 0;
}