#include <algorithm>
#include <iostream>
using namespace std;
int main() {
int num;
while (cin >> num) {
if (num == 0) {
cout << "0" << endl;
continue;
}
int count = 0;
int maxRes = 0;
while (num) {
if (num & 1) {
count++;
}
else {
count = 0;
}
num = num >> 1;
maxRes = max(maxRes, count);
}
cout << maxRes << endl;
}
}
// 64 位输出请用 printf("%lld")