oj.uz

답안 #871650

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
871650 2023-11-11T08:33:25 Z sleepntsheep Tree Rotations (POI11_rot) C++17
100 / 100
 548 ms 52304 KB 
#include <iostream>
#include <cstring>
#include <vector>
#include <algorithm>
#include <deque>
#include <set>
#include <utility>
#include <array>

using i64 = long long;
using u64 = unsigned long long;
using f64 = double;
using f80 = long double;

using namespace std;
#define ALL(x) x.begin(), x.end()
#define ShinLena cin.tie(nullptr)->sync_with_stdio(false);
#define N 1000005

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace __gnu_pbds;
using oset = tree<pair<int, int>, null_type, less<pair<int, int>>, rb_tree_tag, tree_order_statistics_node_update>;

int root, n, L[N], R[N], A[N], alloc;
oset *a[N];
i64 t[N], sz[N];

int read()
{
    int u = ++alloc, p;
    cin >> p;
    if (p) return sz[u] = 1, A[u] = p, u;
    L[u] = read(); R[u] = read();
    return sz[u] = sz[L[u]] + sz[R[u]], u;
}

static inline i64 qry(u64 p)
{
    u64 z{0};
    for (; p < N; p+=p&-p) z += t[p];
    return z;
}

static inline void upd(u64 p, i64 k)
{
    for (; p; p-=p&-p) t[p] += k;
}


u64 order(const oset &s, oset::iterator it)
{
    return it == s.end() ? s.size() : s.order_of_key(*it);
}

void dfs0(int u)
{
    if (!L[u]) return void((a[u] = new oset())->insert({A[u], u}));

    dfs0(L[u]), dfs0(R[u]);


    i64 l2r = 0, r2l = 0;
 

    if (a[R[u]]->size() > a[L[u]]->size())
    {
        for (const pair<int, int> &x : *a[L[u]])
            l2r += order(*a[R[u]], a[R[u]]->lower_bound({x.first, 0})),
            r2l += sz[R[u]] - order(*a[R[u]], a[R[u]]->lower_bound({x.first+1, 0}));
    }
    else
    {
        for (const pair<int, int> &x : *a[R[u]])
            l2r += sz[L[u]] - order(*a[L[u]], a[L[u]]->lower_bound({x.first+1, 0})),
            r2l += order(*a[L[u]], a[L[u]]->lower_bound({x.first, 0}));
    }

    if (r2l < l2r) swap(L[u], R[u]);

    if (sz[R[u]] > sz[L[u]])
    {
        a[u] = a[R[u]];
        for (auto x : *a[L[u]]) a[u]->insert(x);
        delete a[L[u]];
    }
    else
    {
        a[u] = a[L[u]];
        for (auto x : *a[R[u]]) a[u]->insert(x);
        delete a[R[u]];
    }
}


vector<int> corona;

void dfs2(int u)
{
    if (!L[u]) corona.push_back(A[u]);
    else dfs2(L[u]), dfs2(R[u]);
}

int main()
{
    ShinLena;
    cin >> n;
    root = read();

    dfs0(root);
    dfs2(root);

    u64 z{0};

    for (auto x : corona) upd(x, 1), z += qry(x+1);

    cout << z;
    return 0;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 8536 KB Output is correct
2 Correct 1 ms 8536 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct

Subtask #2
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 8540 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 3 ms 8540 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct
4 Correct 2 ms 8796 KB Output is correct

Subtask #4
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 9304 KB Output is correct
2 Correct 7 ms 9052 KB Output is correct
3 Correct 4 ms 9308 KB Output is correct
4 Correct 3 ms 9564 KB Output is correct

Subtask #5
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 11096 KB Output is correct
2 Correct 21 ms 12068 KB Output is correct
3 Correct 69 ms 13960 KB Output is correct
4 Correct 15 ms 13148 KB Output is correct

Subtask #6
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 104 ms 15700 KB Output is correct
2 Correct 62 ms 18096 KB Output is correct
3 Correct 73 ms 20564 KB Output is correct
4 Correct 66 ms 20812 KB Output is correct

Subtask #7
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 84 ms 29644 KB Output is correct
2 Correct 94 ms 27792 KB Output is correct
3 Correct 124 ms 22628 KB Output is correct
4 Correct 88 ms 21404 KB Output is correct

Subtask #8
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 155 ms 22868 KB Output is correct
2 Correct 144 ms 25676 KB Output is correct
3 Correct 127 ms 33876 KB Output is correct
4 Correct 129 ms 33880 KB Output is correct

Subtask #9
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 362 ms 39508 KB Output is correct
2 Correct 207 ms 35152 KB Output is correct
3 Correct 244 ms 38668 KB Output is correct
4 Correct 253 ms 36272 KB Output is correct
5 Correct 454 ms 35708 KB Output is correct

Subtask #10
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 264 ms 35284 KB Output is correct
2 Correct 270 ms 52304 KB Output is correct
3 Correct 301 ms 41348 KB Output is correct
4 Correct 215 ms 51584 KB Output is correct
5 Correct 548 ms 43056 KB Output is correct

Subtask #11
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 323 ms 44024 KB Output is correct
2 Correct 281 ms 42948 KB Output is correct
3 Correct 413 ms 39880 KB Output is correct
4 Correct 340 ms 45396 KB Output is correct
5 Correct 229 ms 51912 KB Output is correct
6 Correct 509 ms 43856 KB Output is correct