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답안 #256141

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
256141 2020-08-02T10:17:10 Z IgorI Bubble Sort 2 (JOI18_bubblesort2) C++17
38 / 100
 9000 ms 4096 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<vector<int> > vvi;
typedef vector<ll> vll;

#define forn(i, n) for (int (i) = 0; (i) != (n); (i)++)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define popcount(x) __builtin_popcount(x)
#define popcountll(x) __builtin_popcountll(x)
#define fi first
#define se second
#define re return
#define pb push_back
#define uniq(x) sort(all(x)); (x).resize(unique(all(x)) - (x).begin())

#ifdef LOCAL
#define dbg(x) cerr << __LINE__ << " " << #x << " " << x << endl
#define ln cerr << __LINE__ << endl
#else
#define dbg(x) void(0)
#define ln void(0)
#endif // LOCAL

const int INF = 1e9 + 7;
const int K = 5;

struct Element{
    int x;
    int pos_order;
    int sp;
};

struct SegTree{
    vector<int> tree;
    vector<int> push;
    SegTree()
    {
        tree.resize(4 * K);
        push.resize(4 * K);
    }
    void Push(int V)
    {
        tree[2 * V + 1] += push[V];
        push[2 * V + 1] += push[V];
        tree[2 * V + 2] += push[V];
        push[2 * V + 2] += push[V];
        push[V] = 0;
    }
    void __Add(int l, int r, int x, int L, int R, int V)
    {
        if (l <= L && R <= r)
        {
            tree[V] += x;
            push[V] += x;
            return;
        }
        if (r <= L || R <= l)
        {
            return;
        }
        int M = (L + R) / 2;
        Push(V);
        __Add(l, r, x, L, M, 2 * V + 1);
        __Add(l, r, x, M, R, 2 * V + 2);
        tree[V] = max(tree[2 * V + 1], tree[2 * V + 2]);
    }
    int Add(int l, int r, int x)
    {
        for (int i = l; i < r; i++) __Add(i, i + 1, x, 0, K, 0);
        //__Add(l, r, x, 0, K, 0);
    }
    int __Get(int l, int r, int L, int R, int V)
    {
        if (l <= L && R <= r)
        {
            return tree[V];
        }
        if (r <= L || R <= l)
        {
            return 0;
        }
        int M = (L + R) / 2;
        Push(M);
        return max(__Get(l, r, L, M, 2 * V + 1), __Get(l, r, M, R, 2 * V + 2));
    }
    int Get(int l, int r)
    {
        return __Get(l, r, 0, K, 0);
    }
    void build(int L, int R, int V, vector<Element> &val)
    {
        if (L + 1 == R)
        {
            tree[V] = val[L].sp;
            push[V] = 0;
            return;
        }
        int M = (L + R) / 2;
        build(L, M, 2 * V + 1, val);
        build(M, R, 2 * V + 2, val);
        push[V] = 0;
        tree[V] = max(tree[2 * V + 1], tree[2 * V + 2]);
    }
};

bool order(Element a, Element b)
{
    return a.pos_order < b.pos_order;
}

bool sorted(Element a, Element b)
{
    return a.x < b.x;
}

struct Block{
    SegTree d;
    vector<Element> a;
    Block()
    {
        a.resize(K);
        for (int i = 0; i < K; i++)
        {
            a[i].x = INF;
            a[i].pos_order = i;
        }
    }
    int cntmore(int x)
    {
        int L = -1, R = a.size();
        while (L + 1 < R)
        {
            int M = (L + R) / 2;
            if (a[M].x > x)
                R = M;
            else
                L = M;
        }
        return K - R;
    }
    void change(int pos_in_block, int initial, int A)
    {
        for (int i = 0; i < K; i++)
        {
            a[i].sp = d.Get(i, i + 1);
        }
        sort(all(a), order);
        int Z = a[pos_in_block].x;
        a[pos_in_block].x = A;
        for (int i = 0; i < pos_in_block; i++)
        {
            if (a[i].x > a[pos_in_block].x) initial++;
        }
        a[pos_in_block].sp = initial;
        for (int i = pos_in_block + 1; i < K; i++)
        {
            a[i].sp -= Z > a[i].x;
            a[i].sp += A > a[i].x;
        }
        sort(all(a), sorted);
        d.build(0, K, 0, a);
    }
    void query(int x, int val)
    {
        int L = -1, R = K;
        while (L + 1 < R)
        {
            int M = (L + R) / 2;
            if (a[M].x < x)
                L = M;
            else
                R = M;
        }
        d.Add(0, L + 1, val);
    }
};

vi countScans(vi a, vi x, vi v)
{
    int n = a.size(), q = x.size();
    vi ans(q);
    vector<Block> data(n / K + 1);
    for (int i = 0; i < n; i++)
    {
        int bl = i / K;
        int ps = i % K;
        int initial = 0;
        for (int j = 0; j < bl; j++) initial += data[j].cntmore(a[i]);
        data[bl].change(ps, initial, a[i]);
    }
    for (int i = 0; i < q; i++)
    {
        int bl = x[i] / K;
        int ps = x[i] % K;
        int initial = 0;
        for (int j = 0; j < bl; j++) initial += data[j].cntmore(v[i]);
        data[bl].change(ps, initial, v[i]);
        int fr = a[x[i]];
        int to = v[i];
        a[x[i]] = v[i];
        for (int j = bl + 1; j < n / K + 1; j++) data[j].query(fr, -1);
        for (int j = bl + 1; j < n / K + 1; j++) data[j].query(to, 1);
        int answer = 0;
        for (int j = 0; j < n / K + 1; j++) answer = max(answer, data[j].d.Get(0, K));
        ans[i] = answer;
        #ifdef LOCAL
        cout << "after i = " << i << endl;
        for (int j = 0; j < n / K + 1; j++)
        {
            cout << j << ": " << endl;
            for (int i = 0; i < K; i++) cout << data[j].a[i].x << " ";
            cout << endl;
            for (int i = 0; i < K; i++) cout << data[j].d.Get(i, i + 1) << " ";
            cout << endl;
        }
        #endif // LOCAL
    }
    return ans;
}

#ifdef LOCAL
signed main()
{
    int n, q;
    cin >> n >> q;
    vi a(n), x(q), v(q);
    forn(i, n) cin >> a[i];
    forn(i, q) cin >> x[i] >> v[i];
    vi ans = countScans(a, x, v);
    forn(i, q) cout << ans[i] << "\n";
}
#endif // LOCAL

/*
10 10
1 2 3 4 5 1 2 3 4 5
0 10
1 9
2 8
3 7
4 6
5 5
6 4
7 3
8 2
9 1
*/

Compilation message

bubblesort2.cpp: In member function 'int SegTree::Add(int, int, int)':
bubblesort2.cpp:78:5: warning: no return statement in function returning non-void [-Wreturn-type]
     }
     ^

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 9 ms 384 KB Output is correct
3 Correct 46 ms 512 KB Output is correct
4 Correct 44 ms 512 KB Output is correct
5 Correct 33 ms 512 KB Output is correct
6 Correct 39 ms 588 KB Output is correct
7 Correct 37 ms 512 KB Output is correct
8 Correct 35 ms 512 KB Output is correct
9 Correct 42 ms 512 KB Output is correct
10 Correct 44 ms 512 KB Output is correct
11 Correct 48 ms 512 KB Output is correct
12 Correct 46 ms 512 KB Output is correct
13 Correct 34 ms 512 KB Output is correct
14 Correct 33 ms 512 KB Output is correct
15 Correct 35 ms 512 KB Output is correct
16 Correct 23 ms 512 KB Output is correct
17 Correct 24 ms 512 KB Output is correct
18 Correct 22 ms 512 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 9 ms 384 KB Output is correct
3 Correct 46 ms 512 KB Output is correct
4 Correct 44 ms 512 KB Output is correct
5 Correct 33 ms 512 KB Output is correct
6 Correct 39 ms 588 KB Output is correct
7 Correct 37 ms 512 KB Output is correct
8 Correct 35 ms 512 KB Output is correct
9 Correct 42 ms 512 KB Output is correct
10 Correct 44 ms 512 KB Output is correct
11 Correct 48 ms 512 KB Output is correct
12 Correct 46 ms 512 KB Output is correct
13 Correct 34 ms 512 KB Output is correct
14 Correct 33 ms 512 KB Output is correct
15 Correct 35 ms 512 KB Output is correct
16 Correct 23 ms 512 KB Output is correct
17 Correct 24 ms 512 KB Output is correct
18 Correct 22 ms 512 KB Output is correct
19 Correct 520 ms 1128 KB Output is correct
20 Correct 706 ms 1308 KB Output is correct
21 Correct 537 ms 1280 KB Output is correct
22 Correct 496 ms 1280 KB Output is correct
23 Correct 687 ms 1188 KB Output is correct
24 Correct 686 ms 1276 KB Output is correct
25 Correct 525 ms 1280 KB Output is correct
26 Correct 516 ms 1272 KB Output is correct
27 Correct 350 ms 1280 KB Output is correct
28 Correct 399 ms 1280 KB Output is correct

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1726 ms 2432 KB Output is correct
2 Execution timed out 9035 ms 4096 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 9 ms 384 KB Output is correct
3 Correct 46 ms 512 KB Output is correct
4 Correct 44 ms 512 KB Output is correct
5 Correct 33 ms 512 KB Output is correct
6 Correct 39 ms 588 KB Output is correct
7 Correct 37 ms 512 KB Output is correct
8 Correct 35 ms 512 KB Output is correct
9 Correct 42 ms 512 KB Output is correct
10 Correct 44 ms 512 KB Output is correct
11 Correct 48 ms 512 KB Output is correct
12 Correct 46 ms 512 KB Output is correct
13 Correct 34 ms 512 KB Output is correct
14 Correct 33 ms 512 KB Output is correct
15 Correct 35 ms 512 KB Output is correct
16 Correct 23 ms 512 KB Output is correct
17 Correct 24 ms 512 KB Output is correct
18 Correct 22 ms 512 KB Output is correct
19 Correct 520 ms 1128 KB Output is correct
20 Correct 706 ms 1308 KB Output is correct
21 Correct 537 ms 1280 KB Output is correct
22 Correct 496 ms 1280 KB Output is correct
23 Correct 687 ms 1188 KB Output is correct
24 Correct 686 ms 1276 KB Output is correct
25 Correct 525 ms 1280 KB Output is correct
26 Correct 516 ms 1272 KB Output is correct
27 Correct 350 ms 1280 KB Output is correct
28 Correct 399 ms 1280 KB Output is correct
29 Correct 1726 ms 2432 KB Output is correct
30 Execution timed out 9035 ms 4096 KB Time limit exceeded
31 Halted 0 ms 0 KB -