10sept2019

#include <stdio.h>
#include <math.h>
#include <time.h>

int main(int argc, char **argv)
{
    int q = 0;
    clock_t start, end;
    start = clock();
    for(int i = 2; i < 100000; i++) {

        int ndelers = 2;
        for(int j = 2; j < i; j++) {
            ndelers += i % j == 0;
            if(ndelers > 4)
                break;
        }
        if(ndelers == 4) {
            q++;
        } else {
            q = 0;
        }
        if(q == 3) {
            printf("i is %3d, ndelers is %d\n", i-1, ndelers);
        }
    }
    end = clock();
    printf("time was %lu.%lu\n", (end - start) / CLOCKS_PER_SEC, (end - start) % CLOCKS_PER_SEC / 10000);
    return 0;
}