oj.uz

Submission #67536

# Submission time Handle Problem Language Result Execution time Memory
67536 2018-08-14T18:39:37 Z imeimi2000 Collapse (JOI18_collapse) C++17
100 / 100
 1983 ms 298616 KB 
#include "collapse.h"
#include <algorithm>
#include <functional>
#include <stdlib.h>
#include <time.h>
#include <map>
 
using namespace std;
typedef pair<int, int> pii;
 
int n, c, q;
 
vector<pii> seg[1 << 18];
vector<pii> query[100001];
vector<int> ans;
void insertLine(int i, int s, int e, int x, int y, pii v) {
    if (e < x || y < s) return;
    if (x <= s && e <= y) {
        seg[i].push_back(v);
        return;
    }
    int m = (s + e) / 2;
    insertLine(i << 1, s, m, x, y, v);
    insertLine(i << 1 | 1, m + 1, e, x, y, v);
}
 
pii par1[100001];
int fen1[100001];
int sz1[100001];
pii par2[100001];
int fen2[100001];
int sz2[100001];
 
struct operate {
    int * p;
    int t;
    int v;
};
void update(int fen[], int i, int v) {
    while (i <= n) {
        fen[i] += v;
        i += i & -i;
    }
}
 
int sum(int fen[], int i) {
    int ret = 0;
    while (i) {
        ret += fen[i];
        i -= i & -i;
    }
    return ret;
}
 
vector<operate> res;
void restore() {
    operate i = res.back();
    res.pop_back();
    if (i.t != 0) {
        update(i.p, i.v, i.t);
    }
    else {
        *i.p = i.v;
    }
}
 
int findDep(pii par[], int x) {
    if (par[x].first) return findDep(par, par[x].first) + 1;
    return 0;
}
 
int find(pii par[], int x, int t) {
    if (par[x].second <= t) return find(par, par[x].first, t);
    return x;
}
 
void saveSz(pii par[], int sz[], int x) {
    while (x) {
        res.push_back({ &sz[x], 0, sz[x] });
        x = par[x].first;
    }
}
 
void addSz(pii par[], int sz[], int x, int v) {
    while (x) {
        sz[x] += v;
        x = par[x].first;
    }
}
 
void merge(pii par[], int fen[], int sz[], int x, int y, int t) {
    int px = find(par, x, t);
    int py = find(par, y, t);
    if (px == py) return;
    if (sz[px] > sz[py]) swap(px, py);
    pii nxt = par[px];
    
    res.push_back({ &par[px].first, 0, nxt.first });
    res.push_back({ &par[px].second, 0, nxt.second });
    
    res.push_back({ fen, 1, nxt.second });
    res.push_back({ fen, -1, t });
    
    addSz(par, sz, nxt.first, -sz[px]);
    par[px] = pii(py, t);
    addSz(par, sz, py, sz[px]);
    update(fen, nxt.second, -1);
    update(fen, t, 1);
    
    if (nxt.first) merge(par, fen, sz, nxt.first, py, nxt.second);
}
 
int answerQuery(int x) {
    return sum(fen1, x) + sum(fen2, n - x);
}
 
void dnc(int i, int s, int e) {
    int ps = res.size();
    for (pii p : seg[i]) {
        int x, y;
        tie(x, y) = p;
        ++x; ++y;
        saveSz(par1, sz1, x);
        saveSz(par1, sz1, y);
        saveSz(par2, sz2, x);
        saveSz(par2, sz2, y);
        merge(par1, fen1, sz1, x, y, y);
        merge(par2, fen2, sz2, x, y, n - x + 1);
    }
    if (s == e) {
        for (pii p : query[s]) {
            ans[p.second] = n - answerQuery(p.first);
        }
    }
    else {
        int m = (s + e) / 2;
        dnc(i << 1, s, m);
        dnc(i << 1 | 1, m + 1, e);
    }
    while (ps < res.size()) restore();
}
 
const int inf = 1e6;
vector<int> simulateCollapse(int N, vector<int> T, vector<int> X,
	vector<int> Y, vector<int> W, vector<int> P) {
    for (int i = 1; i <= 100000; ++i) {
        par1[i] = par2[i] = pii(0, inf);
        sz1[i] = sz2[i] = 1;
    }
    n = N;
    c = T.size();
    q = W.size();
    ans.resize(q);
    
    {
        map<pii, int> mp;
        for (int i = 0; i < c; ++i) {
            if (X[i] > Y[i]) swap(X[i], Y[i]);
            if (T[i]) {
                auto it = mp.find(pii(X[i], Y[i]));
                insertLine(1, 1, c, it->second, i, pii(X[i], Y[i]));
                mp.erase(it);
            }
            else {
                mp[pii(X[i], Y[i])] = i + 1;
            }
        }
        for (auto i : mp) {
            insertLine(1, 1, c, i.second, c, i.first);
        }
    }
    for (int i = 0; i < q; ++i) {
        query[W[i] + 1].emplace_back(P[i] + 1, i);
    }
    dnc(1, 1, c);
    return ans;
}

Compilation message

collapse.cpp: In function 'void dnc(int, int, int)':
collapse.cpp:140:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while (ps < res.size()) restore();
            ~~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 11768 KB Output is correct
2 Correct 16 ms 11768 KB Output is correct
3 Correct 14 ms 11768 KB Output is correct
4 Correct 15 ms 11768 KB Output is correct
5 Correct 15 ms 12024 KB Output is correct
6 Correct 39 ms 14572 KB Output is correct
7 Correct 15 ms 14572 KB Output is correct
8 Correct 16 ms 14572 KB Output is correct
9 Correct 25 ms 14572 KB Output is correct
10 Correct 31 ms 14572 KB Output is correct
11 Correct 46 ms 14624 KB Output is correct
12 Correct 41 ms 14884 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 14884 KB Output is correct
2 Correct 54 ms 15084 KB Output is correct
3 Correct 300 ms 24000 KB Output is correct
4 Correct 48 ms 24000 KB Output is correct
5 Correct 402 ms 25604 KB Output is correct
6 Correct 90 ms 25604 KB Output is correct
7 Correct 1983 ms 294664 KB Output is correct
8 Correct 301 ms 294664 KB Output is correct
9 Correct 47 ms 294664 KB Output is correct
10 Correct 50 ms 294664 KB Output is correct
11 Correct 52 ms 294664 KB Output is correct
12 Correct 338 ms 294664 KB Output is correct
13 Correct 822 ms 294664 KB Output is correct
14 Correct 1259 ms 294664 KB Output is correct
15 Correct 889 ms 294664 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 294664 KB Output is correct
2 Correct 39 ms 294664 KB Output is correct
3 Correct 44 ms 294664 KB Output is correct
4 Correct 43 ms 294664 KB Output is correct
5 Correct 50 ms 294664 KB Output is correct
6 Correct 82 ms 294664 KB Output is correct
7 Correct 1153 ms 294664 KB Output is correct
8 Correct 1264 ms 294664 KB Output is correct
9 Correct 52 ms 294664 KB Output is correct
10 Correct 59 ms 294664 KB Output is correct
11 Correct 769 ms 294664 KB Output is correct
12 Correct 1142 ms 294664 KB Output is correct
13 Correct 949 ms 294664 KB Output is correct
14 Correct 1297 ms 294664 KB Output is correct
15 Correct 1014 ms 294664 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 11768 KB Output is correct
2 Correct 16 ms 11768 KB Output is correct
3 Correct 14 ms 11768 KB Output is correct
4 Correct 15 ms 11768 KB Output is correct
5 Correct 15 ms 12024 KB Output is correct
6 Correct 39 ms 14572 KB Output is correct
7 Correct 15 ms 14572 KB Output is correct
8 Correct 16 ms 14572 KB Output is correct
9 Correct 25 ms 14572 KB Output is correct
10 Correct 31 ms 14572 KB Output is correct
11 Correct 46 ms 14624 KB Output is correct
12 Correct 41 ms 14884 KB Output is correct
13 Correct 44 ms 14884 KB Output is correct
14 Correct 54 ms 15084 KB Output is correct
15 Correct 300 ms 24000 KB Output is correct
16 Correct 48 ms 24000 KB Output is correct
17 Correct 402 ms 25604 KB Output is correct
18 Correct 90 ms 25604 KB Output is correct
19 Correct 1983 ms 294664 KB Output is correct
20 Correct 301 ms 294664 KB Output is correct
21 Correct 47 ms 294664 KB Output is correct
22 Correct 50 ms 294664 KB Output is correct
23 Correct 52 ms 294664 KB Output is correct
24 Correct 338 ms 294664 KB Output is correct
25 Correct 822 ms 294664 KB Output is correct
26 Correct 1259 ms 294664 KB Output is correct
27 Correct 889 ms 294664 KB Output is correct
28 Correct 57 ms 294664 KB Output is correct
29 Correct 39 ms 294664 KB Output is correct
30 Correct 44 ms 294664 KB Output is correct
31 Correct 43 ms 294664 KB Output is correct
32 Correct 50 ms 294664 KB Output is correct
33 Correct 82 ms 294664 KB Output is correct
34 Correct 1153 ms 294664 KB Output is correct
35 Correct 1264 ms 294664 KB Output is correct
36 Correct 52 ms 294664 KB Output is correct
37 Correct 59 ms 294664 KB Output is correct
38 Correct 769 ms 294664 KB Output is correct
39 Correct 1142 ms 294664 KB Output is correct
40 Correct 949 ms 294664 KB Output is correct
41 Correct 1297 ms 294664 KB Output is correct
42 Correct 1014 ms 294664 KB Output is correct
43 Correct 242 ms 294664 KB Output is correct
44 Correct 1827 ms 298616 KB Output is correct
45 Correct 335 ms 298616 KB Output is correct
46 Correct 1322 ms 298616 KB Output is correct
47 Correct 56 ms 298616 KB Output is correct
48 Correct 63 ms 298616 KB Output is correct
49 Correct 69 ms 298616 KB Output is correct
50 Correct 153 ms 298616 KB Output is correct
51 Correct 355 ms 298616 KB Output is correct
52 Correct 625 ms 298616 KB Output is correct
53 Correct 570 ms 298616 KB Output is correct
54 Correct 722 ms 298616 KB Output is correct
55 Correct 642 ms 298616 KB Output is correct
56 Correct 784 ms 298616 KB Output is correct
57 Correct 933 ms 298616 KB Output is correct
58 Correct 1197 ms 298616 KB Output is correct
59 Correct 868 ms 298616 KB Output is correct
60 Correct 1315 ms 298616 KB Output is correct