/*
 * Program to find highest power of 2 <= input.
 */
#include <stdio.h>

int main(void) {
	int input;
	if (scanf("%d", &input) != 1) {
		printf("not an integer\n");
		return 1;
	}

	int power = 0;
	int two_to_power = 1;
	while (2 * two_to_power <= input) {
		power += 1;
		two_to_power *= 2;
	}
	printf("2 to the %d is %d\n", power, two_to_power);

	return 0;
}