judge4-3.c

#include <stdio.h>
int func(int price) {
    int count = 0;
    while(price > 50) {
        price = price / 2;
        count = count + 1;
    }
    return count;
}
int main() {
    int n;
    scanf("%d", &n);
    if(n > 0) {
        printf("%d 次",func(n));
    } else {
        printf("error");
    }
    return 0;
}