#include<iostream>
using namespace std;
void checkTriangke(int side1, int side2,int side3) {
    if ((side1+ side2 > side3) && (side1 + side3 > side2) && (side2 + side3 >side1)) {
        cout<<"Valid"<<endl;
    }else{
        cout<<"Invalid"<<endl;
    }
}
int main()
{
    int s1,s2,s3;
    if(cin>>s1>>s2>>s3){
        checkTrinangle(s1,s2,s3);
        
    }
    return 0;
}