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