#include <stdio.h>
#include <stdint.h>
void print_base(uint16_t num, uint8_t base) {
// Your logic here
if (base == 2) {
printf("%b", num);
} else {
printf("%X", num);
}
}
int main() {
uint16_t num;
uint8_t base;
scanf("%hu %hhu", &num, &base);
print_base(num, base);
return 0;
}