#include<iostream>
using namespace std;

int main() {
    long long side1, side2, side3;
    cin >> side 1>> side 2>> side 3;
    
    if(side1+side2 >side3 &&
       side1+side3 >side2 &&
       side2+side3 >side1) {
       cout<<"Valid";
    }else{
        cout<<"Invalid";
    }
     return 0;
}