【HDOJ】1890 Robotic Sort

伸展树伤不起啊,很容易wa,很容易T,很容易M。

  1 /* 1890 */
  2 #include <iostream>
  3 #include <string>
  4 #include <map>
  5 #include <queue>
  6 #include <set>
  7 #include <stack>
  8 #include <vector>
  9 #include <deque>
 10 #include <algorithm>
 11 #include <cstdio>
 12 #include <cmath>
 13 #include <ctime>
 14 #include <cstring>
 15 #include <climits>
 16 #include <cctype>
 17 #include <cassert>
 18 #include <functional>
 19 #include <iterator>
 20 #include <iomanip>
 21 using namespace std;
 22 //#pragma comment(linker,"/STACK:102400000,1024000")
 23 
 24 #define sti                set<int>
 25 #define stpii            set<pair<int, int> >
 26 #define mpii            map<int,int>
 27 #define vi                vector<int>
 28 #define pii                pair<int,int>
 29 #define vpii            vector<pair<int,int> >
 30 #define rep(i, a, n)     for (int i=a;i<n;++i)
 31 #define per(i, a, n)     for (int i=n-1;i>=a;--i)
 32 #define clr                clear
 33 #define pb                 push_back
 34 #define mp                 make_pair
 35 #define fir                first
 36 #define sec                second
 37 #define all(x)             (x).begin(),(x).end()
 38 #define SZ(x)             ((int)(x).size())
 39 #define lson            l, mid, rt<<1
 40 #define rson            mid+1, r, rt<<1|1
 41 #define grandlson        ch[ch[root][1]][0]
 42 
 43 typedef struct node_t {
 44     int id, val;
 45     node_t() {}
 46     friend bool operator<(const node_t& a, const node_t& b) {
 47         if (a.val != b.val)
 48             return a.val < b.val;
 49         return a.id < b.id;
 50     }
 51 } node_t;
 52 
 53 const int maxn = 1e5+10;
 54 int pre[maxn], ch[maxn][2], size[maxn], rev[maxn];
 55 node_t nd[maxn];
 56 int root, tot, n;
 57 int ans[maxn];
 58 
 59 void newNode(int& r, int k, int fa) {
 60     r = k;
 61     pre[r] = fa;
 62     ch[r][0] = ch[r][1] = 0;
 63     size[r] = 1;
 64     rev[r] = 0;
 65 }
 66 
 67 void PushUp(int r) {
 68     size[r] = size[ch[r][0]] + size[ch[r][1]] + 1;
 69 }
 70 
 71 void UpdateRev(int r) {
 72     if (r == 0)    return ;
 73 
 74     swap(ch[r][0], ch[r][1]);
 75     rev[r] ^= 1;
 76 }
 77 
 78 void PushDown(int r) {
 79     if (rev[r]) {
 80         UpdateRev(ch[r][0]);
 81         UpdateRev(ch[r][1]);
 82         rev[r] = 0;
 83     }
 84 }
 85 
 86 void Build(int& rt, int l, int r, int fa) {
 87     if (l > r)    return ;
 88 
 89     int mid = (l + r) >> 1;
 90     newNode(rt, mid, fa);
 91     Build(ch[rt][0], l, mid-1, rt);
 92     Build(ch[rt][1], mid+1, r, rt);
 93     PushUp(rt);
 94 }
 95 
 96 void Rotate(int x, int d) {
 97     int y = pre[x];
 98     PushDown(y);
 99     PushDown(x);
100     ch[y][d^1] = ch[x][d];
101     pre[ch[x][d]] = y;
102     if (pre[y])
103         ch[pre[y]][ch[pre[y]][1]==y] = x;
104     pre[x] = pre[y];
105     ch[x][d] = y;
106     pre[y] = x;
107     PushUp(y);
108 }
109 
110 void Splay(int r, int goal) {
111     
112     PushDown(r);
113     while (pre[r] != goal) {
114         if (pre[pre[r]] == goal) {
115             PushDown(pre[r]);
116             PushDown(r);
117             Rotate(r, ch[pre[r]][0]==r);
118         } else {
119             PushDown(pre[pre[r]]);
120             PushDown(pre[r]);
121             PushDown(r);
122             int y = pre[r];
123             int d = ch[pre[y]][0]==y;
124             if (ch[y][d] == r) {
125                 Rotate(r, d^1);
126                 Rotate(r, d);
127             } else {
128                 Rotate(y, d);
129                 Rotate(r, d);
130             }
131         }
132     }
133 
134     PushUp(r);
135     if (goal == 0)
136         root = r;
137 }
138 
139 int kth(int r, int k) {
140     int sz = size[ch[r][0]] + 1;
141     
142     PushDown(r);
143     if (k == sz)
144         return r;
145     if (k < sz)
146         return kth(ch[r][0], k);
147     else
148         return kth(ch[r][1], k-sz);
149 }
150 
151 int getNext(int rt) {
152     PushDown(rt);
153     if (ch[rt][1] == 0)        return -1;
154     rt = ch[rt][1];
155     while (ch[rt][0]) {
156         rt = ch[rt][0];
157         PushDown(rt);
158     }
159     return rt;
160 }
161 
162 void init() {
163     ch[root][0] = ch[root][1] = size[root] = rev[root] = 0;
164     newNode(root, n+1, 0);
165     newNode(ch[root][1], n+2, root);
166     Build(grandlson, 1, n, ch[root][1]);
167     PushUp(ch[root][1]);
168     PushUp(root);
169 }
170 
171 void inorder(int rt) {
172     if (rt == 0)    return ;
173 
174     inorder(ch[rt][0]);
175     printf("rt = %d, lson = %d, rson = %d, fa = %d, sz = %d, rev = %d\n",
176         rt, ch[rt][0], ch[rt][1], pre[rt], size[rt], rev[rt]);
177     inorder(ch[rt][1]);
178 }
179 
180 int main() {
181     ios::sync_with_stdio(false);
182     #ifndef ONLINE_JUDGE
183         freopen("data.in", "r", stdin);
184         freopen("data.out", "w", stdout);
185     #endif
186 
187     int r;
188 
189     while (scanf("%d", &n)!=EOF && n) {
190         rep(i, 1, n+1) {
191             scanf("%d", &nd[i].val);
192             nd[i].id = i;
193         }
194         init();
195         sort(nd+1, nd+1+n);
196         rep(i, 1, n+1) {
197             r = nd[i].id;
198             Splay(r, 0);
199             ans[i] = size[ch[root][0]];
200             Splay(kth(root, i), 0);
201             Splay(getNext(r), root);
202             UpdateRev(grandlson);
203         }
204         rep(i, 1, n+1) {
205             printf("%d", ans[i]);
206             if (i == n)
207                 putchar('\n');
208             else
209                 putchar(' ');
210         }
211     }
212 
213     #ifndef ONLINE_JUDGE
214         printf("time = %d.\n", (int)clock());
215     #endif
216 
217     return 0;
218 }

 

posted on 2015-10-23 19:25  Bombe  阅读(130)  评论(0编辑  收藏  举报

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