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#241217#7729. Permutation Compression IIasxziillWA 141ms3572kbC++234.1kb2023-11-06 00:29:112023-11-06 00:29:12

Judging History

你现在查看的是最新测评结果

  • [2023-11-06 00:29:12]
  • 评测
  • 测评结果:WA
  • 用时:141ms
  • 内存:3572kb
  • [2023-11-06 00:29:11]
  • 提交

answer

#include <bits/stdc++.h>

using ll = long long;

template<class Info>
struct SegmentTree {
    int n;
    std::vector<Info> info;
    SegmentTree() : n(0) {}
    SegmentTree(int n_, Info v_ = Info()) {
        init(n_, v_);
    }
    template<class T>
    SegmentTree(std::vector<T> init_) {
        init(init_);
    }
    void init(int n_, Info v_ = Info()) {
        init(std::vector(n_, v_));
    }
    template<class T>
    void init(std::vector<T> init_) {
        n = init_.size();
        info.assign(4 << std::__lg(n), Info());
        std::function<void(int, int, int)> build = [&](int p, int l, int r) {
            if (r - l == 1) {
                info[p] = init_[l];
                return;
            }
            int m = (l + r) / 2;
            build(2 * p, l, m);
            build(2 * p + 1, m, r);
            pull(p);
        };
        build(1, 0, n);
    }
    void pull(int p) {
        info[p] = info[2 * p] + info[2 * p + 1];
    }
    void modify(int p, int l, int r, int x, const Info &v) {
        if (r - l == 1) {
            info[p] = v;
            return;
        }
        int m = (l + r) / 2;
        if (x < m) {
            modify(2 * p, l, m, x, v);
        } else {
            modify(2 * p + 1, m, r, x, v);
        }
        pull(p);
    }
    void modify(int p, const Info &v) {
        modify(1, 0, n, p, v);
    }
    Info rangeQuery(int p, int l, int r, int x, int y) {
        if (l >= y || r <= x) {
            return Info();
        }
        if (l >= x && r <= y) {
            return info[p];
        }
        int m = (l + r) / 2;
        return rangeQuery(2 * p, l, m, x, y) + rangeQuery(2 * p + 1, m, r, x, y);
    }
    Info rangeQuery(int l, int r) {
        return rangeQuery(1, 0, n, l, r);
    }
    template<class F>
    int findFirst(int p, int l, int r, int x, int y, F pred) {
        if (l >= y || r <= x || !pred(info[p])) {
            return -1;
        }
        if (r - l == 1) {
            return l;
        }
        int m = (l + r) / 2;
        int res = findFirst(2 * p, l, m, x, y, pred);
        if (res == -1) {
            res = findFirst(2 * p + 1, m, r, x, y, pred);
        }
        return res;
    }
    template<class F>
    int findFirst(int l, int r, F pred) {
        return findFirst(1, 0, n, l, r, pred);
    }
    template<class F>
    int findLast(int p, int l, int r, int x, int y, F pred) {
        if (l >= y || r <= x || !pred(info[p])) {
            return -1;
        }
        if (r - l == 1) {
            return l;
        }
        int m = (l + r) / 2;
        int res = findLast(2 * p + 1, m, r, x, y, pred);
        if (res == -1) {
            res = findLast(2 * p, l, m, x, y, pred);
        }
        return res;
    }
    template<class F>
    int findLast(int l, int r, F pred) {
        return findLast(1, 0, n, l, r, pred);
    }
};

struct Info
{
    int mx = 0;
    int p = -1;
};

Info operator+(Info a, Info b){
    if (a.mx > b.mx){
        return a;
    }
    else{
        return b;
    }
}

void solve(){
    int n;
    std::cin >> n;
    std::vector<int> pre(n + 1, -1);
    SegmentTree<Info> seg(n);
    std::vector<int> a(n);
    for (int i = 0; i < n; i++){
        std::cin >> a[i];
        Info res = seg.rangeQuery(0, a[i]);
        pre[a[i]] = res.p;
        res.mx += 1;
        res.p = i;
        seg.modify(a[i], res);
    }
    Info res = seg.rangeQuery(0, n);
    int b = res.mx;
    int p = res.p;
    std::set<int> s;
    while (p != -1){
        s.insert(p);
        p = pre[a[p]];
    }

    int mx = 0;
    std::vector<int> ans;
    for (int i = 0; i < n; i++){
        if (s.count(i)){
            mx = std::max(mx, a[i]);
        }
        else if (a[i] > mx){
            ans.push_back(i);
        }
    }
    std::cout << b << " " << ans.size() << "\n";
    for (int i = 0; i < ans.size(); i++){
        std::cout << (ans[i] + 1) << " \n"[i == ans.size() - 1];
    }
}

int main(){
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int t;
    std::cin >> t;
    while (t--){
        solve();
    }
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 3440kb

input:

2
3
3 1 2
3
1 2 3

output:

2 1
1
3 0

result:

ok ok n = 3

Test #2:

score: -100
Wrong Answer
time: 141ms
memory: 3572kb

input:

100000
7
2 6 7 1 4 3 5
6
1 5 6 3 2 4
3
1 2 3
3
2 1 3
14
9 6 13 10 4 7 5 14 1 12 8 3 2 11
3
1 2 3
14
1 9 3 14 5 7 4 6 12 2 8 11 13 10
8
7 1 3 6 2 5 8 4
16
9 3 4 8 7 16 10 6 11 1 14 2 13 12 5 15
3
3 1 2
33
9 10 23 3 16 1 19 32 25 4 5 31 28 7 22 27 30 8 6 17 2 14 13 29 20 33 26 18 24 11 12 15 21
2
2 1
...

output:

3 0
3 0
3 0
2 0
4 5
1 3 4 8 10
3 0
7 3
2 4 9
4 1
1
7 2
1 6
2 1
1
9 21
1 2 3 5 7 8 9 12 13 15 16 17 20 22 23 24 25 26 27 28 29
1 1
1
2 0
1 0
2 0
5 5
2 3 5 6 7
2 0
6 3
3 4 11
3 0
2 0
5 3
1 3 4
1 1
1
3 2
1 7
2 0
4 3
1 2 4
10 19
1 4 8 9 10 11 12 13 14 15 16 17 20 22 25 27 28 31 32
2 2
1 2
1 0
4 3
1 5 6
...

result:

wrong answer Jury has better answer