#include <stdio.h>
#include <stdlib.h>
int main()
{
int num = 20;
int m = 0;
int n = 0;

while (num < 10000000000){
        n = 0;
        for (m = 0; m <= 20; m++){

          if (num%m != 0){
                n = 1;
                break;     }    }

            if (n == 0 ){
                printf("%d\n", num);
                return 0;
                        }
    num++;
                        }
return 0;
}