View Code of Problem 69

#include <cstdio>
#include <iostream>
using namespace std;
int kk(int x){
	if(x<1)
		return x;
	else if(x>=1&&x<10)
		return 2*x-1;
	else
		return 3*x-11;
}
int main(){
	int x;
	cin>>x;
	cout<<kk(x)<<endl;
	return 0;
}