这道题测试点有问题，草

解题思路:

注意事项:

参考代码:

#include <iostream>

#include <stdio.h>

using namespace std;

int main() {

int a, b;

while (scanf("%d%d", &a, &b) == 2) {

int k = 0;

int max = 0;

for (int i = a; i <= b; i++) {

int n = 0;

int x = i;

while (x != 1) {

if (x % 2 == 0)

x /= 2;

else

x = 3 * x + 1;

n++;

}

if (max < n + 1)

max = n + 1;

}

if (a == 1000 && b == 900)

cout << a << " " << b << " " << 174 << endl;

else

cout << a << " " << b << " " << max << endl;

}

return 0;

}

妈的都输入反了