#include <stdio.h>

#define UPPER_TEST 1000000000

int DivisorTest (int dividend) {
    for (int divisor = 1; divisor <=20; divisor++) {
        if ((dividend % divisor) > 0) {
            return 0;
        }
    }
    printf("%i\n", dividend);
    return 1;
}

int main (int argc, const char * argv[]) {
    printf("Starting Test:\n");
    for (int test = 1; test <= UPPER_TEST; test++) {
        DivisorTest(test);
    }
    return 0;
}