// editor1
#include<iostream>
using namespace std;
int main()
{
    int a,b,c;
    cin >> a >> b >> c;
    
    if(a + b > c & & a + c > b & & b + c > a)
    {
        cout << "Valid triangle";
    }
    else
    {
        cout << "Invalid triangle";
    }
    return 0;
}