#include <stdio.h>

int main() {
   int n = 0;
   scanf("%d",&n);
   int count = 0;
   int max = 0;
   while(n!=0)
   {
       if(n%2==1)
       {
          count++;
          if(n/2==0)
          {
             max = max < count?count:max;
             break;
          }
       }
       else if(n%2==0)
       {
            max = max < count?count:max;
            count = 0;
       }
       
       n = n/2;
   }
   printf("%d",max);
}