#include <bits/stdc++.h>
using namespace std;
long long a,b,c;
bool kt;
int main()
{
cin>>a>>b>>c;
kt=false;
if (a==(b+c)/2) kt=true;
if (b==(a+c)/2) kt=true;
if (c==(b+a)/2) kt=true;
if (kt==false) cout<<"Khong lap duoc";
else cout<<"Lap duoc";
return 0;
}