#include <stdio.h>

int main(void) {
    int count_year = 0;
    double pop = 9870.0;

    while (pop < 30000) {
        printf("Population is %5.0f\n", pop);
        pop = pop*.1 + pop;
        count_year++;
    } //while
    printf("It will take %d years.\n", count_year);

    return 0;
} //main