#include<iostream>
using namespace std;
int main(){
    int side1,side2,side3;
    cin>>side1>>side2>>side3;
    isvalid=(side1+side2>side3)&&(side1+side3>side2)&&(side2+side3>side1);
    cout<<(isvalid?"Valid":"Invalid");
    retun 0
    
}