#include <iostream>
using namespace std;
int n, cnt;
int f(int n) {
    if (n == 2)
        cnt = 2;
    else if (n == 4)
        cnt = 4;
    else if (n == 5)
        cnt = 3;
    else if (n == 7)
        cnt = 3;
    else if (n % 3 == 0)
        cnt = n / 3;
    else if (n % 3 == 1)
        cnt = (n - 7) / 3 + 3;
    else if (n % 3 == 2)
        cnt = (n - 5) / 3 + 3;
    return cnt;
}
int main() {
    for (int i = 2; i <= 100; i++)
        cout << "i=" << i << ",fan=" << f(i) << endl;
    return 0;
}