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