oj.uz

Submission #948003

# Submission time Handle Problem Language Result Execution time Memory
948003 2024-03-17T11:52:39 Z Nhoksocqt1 Longest Trip (IOI23_longesttrip) C++17
70 / 100
 17 ms 868 KB 
#ifndef Nhoksocqt1
    #include "longesttrip.h"
#endif // Nhoksocqt1
#include<bits/stdc++.h>
using namespace std;

#define inf 0x3f3f3f3f
#define sz(x) int((x).size())
#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> ii;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int Random(int l, int r) {
    return uniform_int_distribution<int>(l, r)(rng);
}

const int MAXN = 260;

#ifdef Nhoksocqt1

bitset<MAXN> adjp[MAXN], idA, idB, bsA, bsB;
struct Jury {
    int n, d;

    void init(int _n, int _d) {
        n = _n, d = _d;
        int u, v;
        bool check(0);
        while(cin >> u >> v) {
            adjp[u][v] = adjp[v][u] = 1;
            check = 1;
        }

        if(!check) {
            for (int i = 0; i < n; ++i) {
                for (int j = i + 1; j < n; ++j) {
                    for (int k = j + 1; k < n; ++k) {
                        int cnt = adjp[i][j] + adjp[i][k] + adjp[j][k];
                        if(cnt < d) {
                            vector<ii> p;
                            p.push_back(ii(i, j));
                            p.push_back(ii(i, k));
                            p.push_back(ii(j, k));

                            while(cnt < d) {
                                int r = Random(0, 2);
                                if(adjp[p[r].fi][p[r].se])
                                    continue;

                                ++cnt;
                                adjp[p[r].fi][p[r].se] = adjp[p[r].se][p[r].fi] = 1;
                                cout << p[r].fi << ' ' << p[r].se << '\n';
                            }
                        }
                    }
                }
            }
        }
    }

    bool are_connected(const vector<int> &A, const vector<int> &B) {
        bsA = bsB = idA = idB = 0;
        for (int it = 0; it < sz(A); ++it) {
            bsA |= adjp[A[it]];
            idA[A[it]] = 1;
        }

        for (int it = 0; it < sz(B); ++it) {
            bsB |= adjp[B[it]];
            idB[B[it]] = 1;
        }

        return ((bsA & idB).count() > 0 || (bsB & idA).count() > 0);
    }

} jury;

#endif // Nhoksocqt1

vector<int> A[MAXN];
int nxt[MAXN], numNode;
bool adj[MAXN][MAXN], dx[MAXN];

int cntAsk(0);
bool check_are_connected(vector<int> A, vector<int> B) {
    ++cntAsk;
    #ifdef Nhoksocqt1
        return jury.are_connected(A, B);
    #else
        return are_connected(A, B);
    #endif // Nhoksocqt1
}

void mergeLine(deque<int> &line1, deque<int> &line2, bool mergeBack1, bool mergeBack2) {
    if(mergeBack1 && mergeBack2) {
        while(sz(line2)) {
            line1.push_back(line2.back());
            line2.pop_back();
        }

        return;
    }

    if(!mergeBack1 && !mergeBack2) {
        while(sz(line2)) {
            line1.push_front(line2.front());
            line2.pop_front();
        }

        return;
    }

    if(!mergeBack1)
        swap(line1, line2);

    while(sz(line2)) {
        line1.push_back(line2.front());
        line2.pop_front();
    }
}

void mergeLine(deque<int> &line1, deque<int> &line2) {
    if(sz(line2) == 0)
        return;

    if(check_are_connected({line1.back()}, {line2.back()})) {
        mergeLine(line1, line2, 1, 1);
        return;
    }

    if(check_are_connected({line1.back()}, {line2.front()})) {
        mergeLine(line1, line2, 1, 0);
        return;
    }

    if(check_are_connected({line1.front()}, {line2.back()})) {
        mergeLine(line1, line2, 0, 1);
        return;
    }

    if(check_are_connected({line1.front()}, {line2.front()})) {
        mergeLine(line1, line2, 0, 0);
        return;
    }

    vector<int> l1, l2;
    while(sz(line1)) {
        l1.push_back(line1.front());
        line1.pop_front();
    }

    while(sz(line2)) {
        l2.push_back(line2.front());
        line2.pop_front();
    }

    if(!check_are_connected(l1, l2)) {
        for (int it = sz(l1) - 1; it >= 0; --it)
            line1.push_back(l1[it]);

        return;
    }

    int l(0), r(sz(l1) - 1), pos1(-1), pos2(-1);
    while(l <= r) {
        vector<int> p;
        int mid = (l + r) >> 1;
        for (int it = 0; it <= mid; ++it)
            p.push_back(l1[it]);

        if(check_are_connected(p, l2)) {
            pos1 = mid;
            r = mid - 1;
        } else {
            l = mid + 1;
        }
    }

    l = 0, r = sz(l2) - 1;
    while(l <= r) {
        vector<int> p;
        int mid = (l + r) >> 1;
        for (int it = 0; it <= mid; ++it)
            p.push_back(l2[it]);

        if(check_are_connected({l1[pos1]}, p)) {
            pos2 = mid;
            r = mid - 1;
        } else {
            l = mid + 1;
        }
    }

    vector<int> p;
    for (int i = pos1 - 1; i >= 0; --i)
        p.push_back(l1[i]);

    for (int i = sz(l1) - 1; i >= pos1; --i)
        p.push_back(l1[i]);

    for (int i = pos2; i >= 0; --i)
        p.push_back(l2[i]);

    for (int i = sz(l2) - 1; i > pos2; --i)
        p.push_back(l2[i]);

    while(sz(line1))
        line1.pop_back();

    for (int it = sz(p) - 1; it >= 0; --it)
        line1.push_back(p[it]);
}

vector<int> longest_trip(int N, int D) {
    numNode = N;
    if(D == 3) {
        vector<int> ans;
        for (int i = 0; i < numNode; ++i)
            ans.push_back(i);

        return ans;
    }

    vector<int> ans, id;
    for (int i = 0; i < numNode; ++i)
        id.push_back(i);

    shuffle(id.begin(), id.end(), rng);

    deque<int> line1, line2;
    line1.push_back(id[0]);
    line2.push_back(id[1]);

    bool needAsk(1);
    for (int i = 2; i < numNode; ++i) {
        if(check_are_connected({line1.back()}, {id[i]})) {
            line1.push_back(id[i]);
            needAsk = 1;
        } else
            if(!needAsk || check_are_connected({line2.back()}, {id[i]})) {
                line2.push_back(id[i]);
                needAsk = 0;
            } else {
                if(i + 2 < numNode) {
                    bool c1 = check_are_connected({id[i]}, {id[i + 1]});
                    bool c2 = check_are_connected({id[i]}, {id[i + 2]});

                    if(c1 && c2) {
                        mergeLine(line1, line2, 1, 1);
                        line2.push_back(id[i + 1]);
                        line2.push_back(id[i]);
                        line2.push_back(id[i + 2]);
                    } else
                        if(!c1 && !c2) {
                            line1.push_back(id[i + 1]);
                            line1.push_back(id[i + 2]);
                            mergeLine(line1, line2, 1, 1);
                            line2.push_back(id[i]);
                        } else {
                            if(!c1) {
                                line1.push_back(id[i + 1]);
                            } else {
                                line1.push_back(id[i + 2]);
                            }

                            mergeLine(line1, line2, 1, 1);
                            if(!c1) {
                                line2.push_back(id[i + 2]);
                            } else {
                                line2.push_back(id[i + 1]);
                            }

                            line2.push_back(id[i]);
                        }

                    i += 2;
                } else {
                    mergeLine(line1, line2, 1, 1);
                    line2.push_back(id[i]);
                }

                needAsk = 1;
            }
    }

    if(sz(line1) < sz(line2))
        swap(line1, line2);

    mergeLine(line1, line2);

    ans.clear();
    while(sz(line1)) {
        ans.push_back(line1.front());
        line1.pop_front();
    }

    for (int it = 0; it + 1 < sz(ans); ++it)
        assert(check_are_connected({ans[it]}, {ans[it + 1]}));

    return ans;
}

#ifdef Nhoksocqt1

int main(void) {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);

    #define TASK "longesttrip"
    if(fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }

    int n, d;
    cin >> n >> d;
    jury.init(n, d);

    vector<int> path = longest_trip(n, d);
    cout << "CNT ASK: " << cntAsk << '\n';
    cout << "ANSWER " << sz(path) << ": ";
    for (int it = 0; it < sz(path); ++it)
        cout << path[it] << ' '; cout << '\n';

    return 0;
}

#endif // Nhoksocqt1

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 3 ms 344 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 344 KB Output is correct
2 Correct 1 ms 352 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 10 ms 344 KB Output is correct
3 Correct 8 ms 344 KB Output is correct
4 Correct 8 ms 344 KB Output is correct
5 Correct 8 ms 344 KB Output is correct
6 Correct 11 ms 344 KB Output is correct
7 Correct 10 ms 344 KB Output is correct
8 Correct 9 ms 344 KB Output is correct
9 Correct 9 ms 344 KB Output is correct
10 Correct 8 ms 344 KB Output is correct
11 Correct 8 ms 344 KB Output is correct
12 Correct 10 ms 344 KB Output is correct
13 Correct 10 ms 344 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 344 KB Output is correct
2 Correct 9 ms 344 KB Output is correct
3 Correct 9 ms 344 KB Output is correct
4 Correct 12 ms 344 KB Output is correct
5 Correct 9 ms 344 KB Output is correct
6 Correct 13 ms 344 KB Output is correct
7 Correct 14 ms 344 KB Output is correct
8 Correct 9 ms 344 KB Output is correct
9 Correct 8 ms 344 KB Output is correct
10 Correct 8 ms 344 KB Output is correct
11 Correct 8 ms 344 KB Output is correct
12 Correct 8 ms 344 KB Output is correct
13 Correct 11 ms 344 KB Output is correct
14 Correct 15 ms 344 KB Output is correct
15 Correct 13 ms 340 KB Output is correct
16 Correct 12 ms 600 KB Output is correct
17 Correct 9 ms 600 KB Output is correct
18 Correct 12 ms 612 KB Output is correct
19 Correct 9 ms 344 KB Output is correct
20 Correct 11 ms 344 KB Output is correct
21 Correct 10 ms 344 KB Output is correct
22 Correct 9 ms 344 KB Output is correct
23 Correct 10 ms 344 KB Output is correct
24 Correct 10 ms 344 KB Output is correct
25 Correct 14 ms 344 KB Output is correct
26 Correct 12 ms 344 KB Output is correct
27 Correct 17 ms 344 KB Output is correct
28 Correct 10 ms 344 KB Output is correct
29 Correct 11 ms 344 KB Output is correct
30 Correct 10 ms 456 KB Output is correct
31 Correct 9 ms 456 KB Output is correct
32 Correct 9 ms 456 KB Output is correct
33 Correct 8 ms 344 KB Output is correct
34 Correct 9 ms 344 KB Output is correct
35 Correct 9 ms 344 KB Output is correct
36 Correct 9 ms 344 KB Output is correct
37 Correct 10 ms 344 KB Output is correct
38 Correct 9 ms 344 KB Output is correct
39 Correct 9 ms 344 KB Output is correct
40 Correct 10 ms 600 KB Output is correct
41 Correct 9 ms 344 KB Output is correct
42 Correct 9 ms 528 KB Output is correct
43 Correct 8 ms 456 KB Output is correct
44 Correct 8 ms 600 KB Output is correct
45 Correct 12 ms 344 KB Output is correct
46 Correct 15 ms 344 KB Output is correct
47 Correct 12 ms 344 KB Output is correct
48 Correct 11 ms 344 KB Output is correct
49 Correct 10 ms 344 KB Output is correct
50 Correct 9 ms 708 KB Output is correct
51 Correct 14 ms 460 KB Output is correct
52 Correct 12 ms 456 KB Output is correct
53 Correct 10 ms 468 KB Output is correct
54 Correct 9 ms 856 KB Output is correct
55 Correct 10 ms 600 KB Output is correct
56 Correct 10 ms 708 KB Output is correct
57 Correct 9 ms 724 KB Output is correct
58 Correct 12 ms 868 KB Output is correct
59 Correct 13 ms 604 KB Output is correct
60 Correct 11 ms 464 KB Output is correct
61 Correct 10 ms 608 KB Output is correct
62 Correct 11 ms 464 KB Output is correct
63 Correct 12 ms 604 KB Output is correct
64 Correct 10 ms 708 KB Output is correct

Subtask #4
30.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 344 KB Output is correct
2 Correct 9 ms 344 KB Output is correct
3 Correct 8 ms 344 KB Output is correct
4 Correct 9 ms 344 KB Output is correct
5 Partially correct 9 ms 344 KB Output is partially correct
6 Correct 13 ms 344 KB Output is correct
7 Correct 12 ms 344 KB Output is correct
8 Correct 8 ms 600 KB Output is correct
9 Correct 9 ms 344 KB Output is correct
10 Partially correct 9 ms 344 KB Output is partially correct
11 Partially correct 9 ms 344 KB Output is partially correct
12 Partially correct 9 ms 344 KB Output is partially correct
13 Partially correct 9 ms 344 KB Output is partially correct
14 Correct 13 ms 344 KB Output is correct
15 Correct 10 ms 344 KB Output is correct
16 Correct 11 ms 600 KB Output is correct
17 Correct 9 ms 344 KB Output is correct
18 Correct 10 ms 344 KB Output is correct
19 Correct 10 ms 344 KB Output is correct
20 Correct 11 ms 344 KB Output is correct
21 Correct 12 ms 344 KB Output is correct
22 Correct 12 ms 344 KB Output is correct
23 Correct 10 ms 344 KB Output is correct
24 Correct 11 ms 344 KB Output is correct
25 Correct 11 ms 344 KB Output is correct
26 Correct 10 ms 452 KB Output is correct
27 Correct 10 ms 460 KB Output is correct
28 Correct 10 ms 456 KB Output is correct
29 Correct 9 ms 340 KB Output is correct
30 Correct 8 ms 344 KB Output is correct
31 Correct 9 ms 344 KB Output is correct
32 Correct 12 ms 344 KB Output is correct
33 Correct 11 ms 344 KB Output is correct
34 Correct 11 ms 344 KB Output is correct
35 Correct 14 ms 344 KB Output is correct
36 Correct 15 ms 344 KB Output is correct
37 Correct 10 ms 460 KB Output is correct
38 Correct 11 ms 452 KB Output is correct
39 Correct 11 ms 456 KB Output is correct
40 Correct 9 ms 600 KB Output is correct
41 Correct 10 ms 600 KB Output is correct
42 Correct 10 ms 604 KB Output is correct
43 Partially correct 9 ms 344 KB Output is partially correct
44 Partially correct 9 ms 344 KB Output is partially correct
45 Partially correct 11 ms 344 KB Output is partially correct
46 Partially correct 9 ms 344 KB Output is partially correct
47 Partially correct 9 ms 600 KB Output is partially correct
48 Partially correct 9 ms 616 KB Output is partially correct
49 Partially correct 11 ms 600 KB Output is partially correct
50 Partially correct 12 ms 464 KB Output is partially correct
51 Partially correct 9 ms 500 KB Output is partially correct
52 Partially correct 7 ms 344 KB Output is partially correct
53 Partially correct 8 ms 340 KB Output is partially correct
54 Partially correct 8 ms 344 KB Output is partially correct
55 Partially correct 8 ms 344 KB Output is partially correct
56 Partially correct 8 ms 344 KB Output is partially correct
57 Partially correct 9 ms 600 KB Output is partially correct
58 Partially correct 10 ms 600 KB Output is partially correct
59 Partially correct 8 ms 344 KB Output is partially correct
60 Partially correct 9 ms 344 KB Output is partially correct
61 Partially correct 10 ms 440 KB Output is partially correct
62 Partially correct 11 ms 472 KB Output is partially correct
63 Partially correct 10 ms 720 KB Output is partially correct
64 Partially correct 11 ms 728 KB Output is partially correct
65 Partially correct 10 ms 720 KB Output is partially correct
66 Partially correct 13 ms 612 KB Output is partially correct
67 Partially correct 14 ms 468 KB Output is partially correct
68 Partially correct 10 ms 468 KB Output is partially correct
69 Partially correct 11 ms 720 KB Output is partially correct
70 Partially correct 12 ms 612 KB Output is partially correct
71 Partially correct 9 ms 732 KB Output is partially correct
72 Partially correct 10 ms 716 KB Output is partially correct
73 Partially correct 11 ms 612 KB Output is partially correct
74 Partially correct 13 ms 604 KB Output is partially correct
75 Partially correct 14 ms 604 KB Output is partially correct
76 Partially correct 10 ms 720 KB Output is partially correct
77 Partially correct 11 ms 728 KB Output is partially correct
78 Partially correct 11 ms 464 KB Output is partially correct
79 Partially correct 11 ms 720 KB Output is partially correct
80 Partially correct 12 ms 860 KB Output is partially correct
81 Partially correct 10 ms 860 KB Output is partially correct
82 Partially correct 10 ms 608 KB Output is partially correct