#include <cs50.h>
#include <stdio.h>

int main(void)
{
    // TODO: Prompt for start size
    int start_size = 0;
    int end_size = 0;
    while (start_size < 9)
    {
        start_size = get_int("Enter start size.\n");
    }
    // TODO: Prompt for end size
    while (end_size < start_size)
    {
        end_size = get_int("Enter end size.\n");
    }
    // TODO: Calculate number of years until we reach threshold
    int current_size = start_size;
    int born = 0;
    int died = 0;
    int years = 0;

    while (current_size < end_size)
    {
        born = current_size / 3;
        died = current_size / 4;
        current_size = current_size + born - died;
        years++;
    }
    // TODO: Print number of years

    printf("Years: %i\n", years);
}