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답안 #553284

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
553284 2022-04-25T10:51:15 Z RaresFelix Collapse (JOI18_collapse) C++17
35 / 100
 15000 ms 430612 KB 
#include "collapse.h"
#include <bits/stdc++.h>

using namespace std;
using Edge = tuple<int, int, int, int>; //from, to, begin, end
using vEd = vector<Edge>;
using vi = vector<int>;

struct DSU { /// with roll_back
    int n;
    vector<int> P, S;
    DSU(int n) : n(n) {
        P.resize(n), S.assign(n, 1);
        for(int i = 0; i < n; ++i) P[i] = i;
    }
    int repr(int u) {
        return u == P[u] ? u : repr(P[u]);
    }
    int nr_uni = 0;
    stack<int> RP, RS;
    void uni(int u, int v) {
        u = repr(u), v = repr(v);
        if(u == v) return;
        if(S[u] < S[v]) swap(u, v);
        ++nr_uni, RP.push(v); RS.push(S[v]);
        P[v] = u, S[u] += S[v];
    }
    void roll_back(int update_count) {
        while(nr_uni > update_count) {
            --nr_uni;
            P[RP.top()] = RP.top();
            S[RP.top()] = RS.top();
            RP.pop(), RS.pop();
        }
    }
};

struct Bucket {
    DSU Simu;
    int begin, end;
    Bucket(int n, int begin, int end) : Simu(n), begin(begin), end(end) {}
    vector<Edge> idk;
    void add_edge(Edge nou) {
        auto &[f, t, b, e] = nou;
        if(e < begin || end < b) return;
        if(b <= begin && end <= e) { //complet
            Simu.uni(f, t);
            return;
        }
        idk.push_back(nou);
    }
    int query(int timp) {
        int count0 = Simu.nr_uni;
        for(auto &it : idk) {
            auto &[f, t, b, e] = it;
            if(b <= timp && timp <= e) Simu.uni(f, t);
        }
        int re = Simu.nr_uni;
        Simu.roll_back(count0);
        return re;
    }
};

void solve(int n, int c, int q, vEd &edges, vi &W, vi &P, vi &R) {
    R.assign(q, 0);
    vector<vi> Queries(n + 2);
    for(int i = 0; i < q; ++i)
        Queries[P[i]].push_back(i);
    vector<vEd> Add(n + 1);
    for(auto &[f, t, b, e] : edges)
        Add[t].push_back({f, t, b, e});

    int bucketSize = int(sqrt(c + 1));
    vector<Bucket> Sol;
    for(int lp = 0; lp <= c + 1; lp += bucketSize)
        Sol.emplace_back(n, lp, lp + bucketSize - 1);

    for(int i = 0; i < n; ++i) {
        for(auto &it : Add[i])
            for(auto &seg : Sol) seg.add_edge(it);
        for(auto &qid : Queries[i]) {
            int w = W[qid];
            int re = 0;
            for(auto &seg : Sol) {
                if(seg.begin <= w && w <= seg.end) {
                    re = seg.query(w);
                    break;
                }
            }
            R[qid] = i + 1 - re;
        }
    }
}

vector<int> simulateCollapse(
	int n,
	vector<int> T,
	vector<int> X,
	vector<int> Y,
	vector<int> W,
	vector<int> P
) {
    vEd edges;
    int c = T.size(), q = W.size();
    map<pair<int, int>, int> enabled;
    for(int i = 0 ; i < c; ++i)
        if(X[i] > Y[i]) swap(X[i], Y[i]);
    for(int i = 0 ; i < c; ++i) {
        if(!T[i])
            enabled[{X[i], Y[i]}] = i;
        else {
            edges.push_back({X[i], Y[i], enabled[{X[i], Y[i]}], i - 1});
            enabled[{X[i], Y[i]}] = -1;
        }
    }
    for(auto [p, e] : enabled) if(e != -1) {
        auto [f, t] = p;
        edges.push_back({f, t, e, c + 1});
    }
    vector<int> R, R1, R2;
    solve(n, c, q, edges, W, P, R1);
    for(auto &it : P) it = n - 2 - it;
    for(auto &[a, b, c, d] : edges)
        a = n - 1 - a, b = n - 1 - b, a ^= b, b ^= a, a ^= b;
    solve(n, c, q, edges, W, P, R2);
    for(int i = 0; i < q; ++i) R.push_back(R1[i] + R2[i]);
    return R;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 848 KB Output is correct
2 Correct 3 ms 468 KB Output is correct
3 Correct 3 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 7 ms 852 KB Output is correct
6 Correct 11 ms 1520 KB Output is correct
7 Correct 3 ms 1108 KB Output is correct
8 Correct 3 ms 1156 KB Output is correct
9 Correct 13 ms 6476 KB Output is correct
10 Correct 19 ms 6484 KB Output is correct
11 Correct 31 ms 6696 KB Output is correct
12 Correct 30 ms 6776 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 3524 KB Output is correct
2 Correct 28 ms 3508 KB Output is correct
3 Correct 169 ms 9120 KB Output is correct
4 Correct 30 ms 3504 KB Output is correct
5 Correct 333 ms 10380 KB Output is correct
6 Correct 67 ms 4240 KB Output is correct
7 Correct 520 ms 25396 KB Output is correct
8 Correct 505 ms 52124 KB Output is correct
9 Correct 33 ms 11964 KB Output is correct
10 Correct 41 ms 15940 KB Output is correct
11 Correct 119 ms 60516 KB Output is correct
12 Correct 1227 ms 420456 KB Output is correct
13 Correct 2609 ms 424612 KB Output is correct
14 Correct 7688 ms 429972 KB Output is correct
15 Correct 4271 ms 428956 KB Output is correct

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 27 ms 3768 KB Output is correct
2 Correct 29 ms 3848 KB Output is correct
3 Correct 28 ms 3904 KB Output is correct
4 Correct 32 ms 4008 KB Output is correct
5 Correct 59 ms 4308 KB Output is correct
6 Correct 82 ms 5308 KB Output is correct
7 Correct 529 ms 22552 KB Output is correct
8 Correct 1927 ms 73832 KB Output is correct
9 Correct 65 ms 15144 KB Output is correct
10 Correct 204 ms 61772 KB Output is correct
11 Correct 4396 ms 430612 KB Output is correct
12 Execution timed out 15117 ms 426612 KB Time limit exceeded
13 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 848 KB Output is correct
2 Correct 3 ms 468 KB Output is correct
3 Correct 3 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 7 ms 852 KB Output is correct
6 Correct 11 ms 1520 KB Output is correct
7 Correct 3 ms 1108 KB Output is correct
8 Correct 3 ms 1156 KB Output is correct
9 Correct 13 ms 6476 KB Output is correct
10 Correct 19 ms 6484 KB Output is correct
11 Correct 31 ms 6696 KB Output is correct
12 Correct 30 ms 6776 KB Output is correct
13 Correct 34 ms 3524 KB Output is correct
14 Correct 28 ms 3508 KB Output is correct
15 Correct 169 ms 9120 KB Output is correct
16 Correct 30 ms 3504 KB Output is correct
17 Correct 333 ms 10380 KB Output is correct
18 Correct 67 ms 4240 KB Output is correct
19 Correct 520 ms 25396 KB Output is correct
20 Correct 505 ms 52124 KB Output is correct
21 Correct 33 ms 11964 KB Output is correct
22 Correct 41 ms 15940 KB Output is correct
23 Correct 119 ms 60516 KB Output is correct
24 Correct 1227 ms 420456 KB Output is correct
25 Correct 2609 ms 424612 KB Output is correct
26 Correct 7688 ms 429972 KB Output is correct
27 Correct 4271 ms 428956 KB Output is correct
28 Correct 27 ms 3768 KB Output is correct
29 Correct 29 ms 3848 KB Output is correct
30 Correct 28 ms 3904 KB Output is correct
31 Correct 32 ms 4008 KB Output is correct
32 Correct 59 ms 4308 KB Output is correct
33 Correct 82 ms 5308 KB Output is correct
34 Correct 529 ms 22552 KB Output is correct
35 Correct 1927 ms 73832 KB Output is correct
36 Correct 65 ms 15144 KB Output is correct
37 Correct 204 ms 61772 KB Output is correct
38 Correct 4396 ms 430612 KB Output is correct
39 Execution timed out 15117 ms 426612 KB Time limit exceeded
40 Halted 0 ms 0 KB -