#include<iostream> using namespace std; int main() { int a[601] = {0}; int m,n,i = 1,k = 0,temp; cin >> n; temp = n; while(n-1) { if(a[i] == 0) { k++; } if(k == 3) { a[i] = 1; k = 0; //cout << i <<" "; n--; } i++; if(i > temp) { i = 1; } } i = 1; while(a[i++]); cout << i-1<<endl; return 0; }