oj.uz

답안 #871638

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
871638 2023-11-11T08:19:16 Z sleepntsheep Tree Rotations (POI11_rot) C++17
36 / 100
 1000 ms 34672 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;
}

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

    r2l=l2r=0;
 
    for (auto x : *a[L[u]]) upd(x.first, 1);
    for (auto x : *a[R[u]]) l2r += qry(x.first + 1);
    for (auto x : *a[L[u]]) upd(x.first, -1);
    for (auto x : *a[R[u]]) upd(x.first, 1);
    for (auto x : *a[L[u]]) r2l += qry(x.first + 1);
    for (auto x : *a[R[u]]) upd(x.first, -1);

    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 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
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 2 ms 8540 KB Output is correct
3 Correct 2 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 3 ms 8540 KB Output is correct
2 Correct 3 ms 8760 KB Output is correct
3 Correct 3 ms 8796 KB Output is correct
4 Correct 9 ms 8796 KB Output is correct

Subtask #4
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 349 ms 9380 KB Output is correct
2 Correct 13 ms 9048 KB Output is correct
3 Correct 298 ms 9324 KB Output is correct
4 Correct 223 ms 9560 KB Output is correct

Subtask #5
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1089 ms 13084 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 212 ms 15752 KB Output is correct
2 Execution timed out 1068 ms 15384 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #7
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1051 ms 29068 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1048 ms 13380 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1062 ms 34672 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1042 ms 21340 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #11
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1047 ms 22800 KB Time limit exceeded
2 Halted 0 ms 0 KB -