C语言版本

#include <stdio.h>

int main() {
    int n, rangeMax, rangeCur;
    while(scanf("%d", &n) != EOF) {
        rangeMax = 0, rangeCur = 0;
        while (n > 0) {
           if ((n & 0x1) == 0x1) {
               rangeCur++;
               if (rangeCur > rangeMax) {
                   rangeMax = rangeCur;
               }
           } else {
               rangeCur = 0;
           }
           n >>= 1;
        }
        printf("%d\n", rangeMax);
    }
    return 0;
}

Python版本

while True:
    try:
        n = int(input())
        binStr = bin(n)[2:]
        temp = binStr.split('0')
        print(max(map(len, temp)))
    except:
        break