#include <stdio.h>

int main(void)
{
  int i, n;

  printf("Enter an integer: ");
  scanf("%d", &n);

  i = 1;
  while ( i < n) 
    i = i * 2;

  printf("The smallest power of 2 that is greater than or equal to a number %d is %d\n", n, i);

  return 0;
}