【HDOJ】3029 Scales

CF上有道类似的，做了那个这个简单多了。思路是取模。模等于1如何处理，模等于2如何分类分类讨论后。可解。
解得对数据排序后再输出。

/* 3029 */
#include <iostream>
#include <string>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <vector>
#include <deque>
#include <algorithm>
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cstring>
#include <climits>
#include <cctype>
#include <cassert>
#include <functional>
using namespace std;
//#pragma comment(linker,"/STACK:102400000,1024000")

#define mpii            map<int,int>
#define vi                vector<int>
#define pii                pair<int,int>
#define vpii            vector<pair<int,int> >
#define rep(i, a, n)     for (int i=a;i<n;++i)
#define per(i, a, n)     for (int i=n-1;i>=a;--i)
#define clr                clear
#define pb                 push_back
#define mp                 make_pair
#define fir                first
#define sec                second
#define all(x)             (x).begin(),(x).end()
#define SZ(x)             ((int)(x).size())
#define lson            l, mid, rt<<1
#define rson            mid+1, r, rt<<1|1

vi l, r;

void dfs(int m) {
    int tmp = m % 3;
    int m_;

    if (m == 0)
        return ;

    if (tmp == 2) {
        m_ = m/3+1;
    } else {
        m_ = m/3;
    }

    dfs(m_);

    rep(i, 0, SZ(l))
        l[i] *= 3;
    rep(i, 0, SZ(r))
        r[i] *= 3;

    if (tmp == 2) {
        r.pb(1);
    } else if (tmp == 1) {
        l.pb(1);
    }
}

int main() {
    ios::sync_with_stdio(false);
    #ifndef ONLINE_JUDGE
        freopen("data.in", "r", stdin);
        freopen("data.out", "w", stdout);
    #endif

    int m;
    int lsz, rsz;

    while (scanf("%d",&m)!=EOF) {
        l.clear();
        r.clear();
        dfs(m);
        sort(all(l));
        sort(all(r));
        lsz = SZ(l);
        rsz = SZ(r);
        printf("%d", rsz);
        rep(i, 0, rsz)
            printf(" %d", r[i]);
        putchar('
');

        printf("%d", lsz);
        rep(i, 0, lsz)
            printf(" %d", l[i]);
        putchar('
');
    }

    #ifndef ONLINE_JUDGE
        printf("time = %d.
", (int)clock());
    #endif

    return 0;
}