#include <stdio.h>
int main() {
int n;
int mask = 1;
int max = 0;
int tempLen = 0;
while (scanf("%d", &n) != EOF) {
mask = 1;
max = 0;
tempLen = 0;
for (; mask!=0; mask<<=1) {
if ((n&mask) != 0) {
tempLen++;
} else {
if (tempLen > max) {
max = tempLen;
} else {}
tempLen = 0;
}
}
printf("%d\n", max);
}
return 0;
}

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