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#include <iostream>
using namespace std;
int func(int x) {
if (x <= 3)
return x * 2 - 1;
else if (x >= 6)
return func(x - 3) - 2;
else
return func(x + 1) + x;
}
int main() {
cout << func(14);
// f(14)=f(11)-2;
// f(11)=f(8)-2
// f(8)=f(5)-2
// f(5)=f(6)+5
// f(6)=f(3)-2
// f(3)=5
return 0;
}