（树）Subtrees -- hdu -- 5524

http://acm.hdu.edu.cn/showproblem.php?pid=5524

Subtrees

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)
Total Submission(s): 184    Accepted Submission(s): 99

Problem Description

There is a complete binary tree with N nodes.The subtree of the node i has Ai nodes.How many distinct numbers are there of Ai?

Input

There are multiple test cases, no more than 1000 cases.
For each case contains a single integer N on a line.(1≤N≤1018)

Output

The output of each case will be a single integer on a line:the number of subtrees that contain different nodes.

Sample Input

5

6

7

8

Sample Output

3

4

3

5

Source

BestCoder Round #61 (div.2)

在Hack的时候截别人的代码， 然而我并不懂什么意思， 但相信自己以后会会的！！！

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>

typedef long long ll;

using namespace std;

ll ans= , Max=, n;

void search(ll x)
{
    ll lc=x, rc=x, dep=;
    while(lc*<=n) lc *= , dep++;
    while(rc*+<=n) rc = rc* + ;

    if(lc<=rc) Max = max(Max, dep);
    else
    {
        search(x*);
        search(x*+);
        ans++;
    }
}

int main()
{
    while(~scanf("%I64d", &n))
    {
        ans = ;
        Max = ;
        search();
        printf("%I64d\n", ans+Max+);
    }
    return ;
}

代码1:

#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<set>

using namespace std;
typedef long long ll;
set<ll> st;
set<ll>::iterator it;

void deal(ll n)
{
    ll k, t;
    if((it=st.find(n)) !=st.end())
        return ;
    st.insert(n);
    for(k=; k>=; k--)
    {
        if((1ll<<k)&(n+))break;
    }
    t = n - (1ll<<k) + ;
    deal((1ll<<(k-)) +min(t, 1ll<<(k-))-);
    deal((1ll<<(k-)) +max(0ll, t-(1ll<<(k-)))-);
}

int main()
{
    ll n;

    while(~scanf("%I64d", &n))
    {
        st.clear();
        st.insert();
        st.insert();
        deal(n);
        printf("%d\n", st.size()-);
    }
    return ;
}

代码2：