oj.uz

답안 #876475

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
876475 2023-11-21T19:25:56 Z danikoynov Fish 2 (JOI22_fish2) C++14
31 / 100
 4000 ms 22212 KB 
#include<bits/stdc++.h>
#define endl '\n'

using namespace std;

typedef long long ll;

const int maxn = 1e5 + 10;


int n, q;
ll a[maxn], pref[maxn];
void input()
{
    cin >> n;
    for (int i = 1; i <= n; i ++)
        cin >> a[i];
    cin >> q;
    a[0] = 1e9 + 10;
    a[n + 1] = 1e9 + 10;

}

vector < pair < int, int > > ranges;
void get_ranges()
{

    for (int i = 1; i <= n; i ++)
        pref[i] = pref[i - 1] + a[i];
    pref[n + 1] = pref[n];

    ranges.clear();
    stack < int > st;
    st.push(0);
    for (int i = 1; i <= n; i ++)
    {
        while(!st.empty() && a[st.top()] < a[i])
            st.pop();


        if (pref[i - 1] - pref[st.top()] < a[i])
            ranges.push_back({st.top() + 1, i - 1});

        st.push(i);
    }

    while(!st.empty())
        st.pop();
    st.push(n + 1);
    for (int i = n; i > 0; i --)
    {
        while(!st.empty() && a[st.top()] < a[i])
            st.pop();

        if (pref[st.top() - 1] - pref[i] < a[i])
            ranges.push_back({i + 1, st.top() - 1});

        st.push(i);
    }
}

int b[maxn];

struct node
{
    int cnt, mx;

    node(int _cnt = 0, int _mx = 1e9 + 10)
    {
        cnt = _cnt;
        mx = _mx;
    }
};

node tree[4 * maxn];

node merge_node(node lf, node rf)
{
    if (lf.cnt == -1 || rf.mx < lf.mx)
        return rf;
    if (rf.cnt == -1 || lf.mx < rf.mx)
        return lf;

    return node(lf.cnt + rf.cnt, lf.mx);
}

void build_tree(int root, int left, int right)
{
    if (left == right)
    {
        tree[root].mx = b[left];
        tree[root].cnt = 1;
        return;
    }

    int mid = (left + right) / 2;
    build_tree(root * 2, left, mid);
    build_tree(root * 2 + 1, mid + 1, right);

    tree[root] = merge_node(tree[root * 2], tree[root * 2 + 1]);
}

node query(int root, int left, int right, int qleft, int qright)
{
    if (left > qright || right < qleft)
        return node(-1, 1e9 + 10);

    if (left >= qleft && right <= qright)
        return tree[root];

    int mid = (left + right) / 2;

    return merge_node(query(root * 2, left, mid, qleft, qright),
            query(root * 2 + 1, mid + 1, right, qleft, qright));
}

ll values[maxn];

struct segment_tree
{
    ll tree[4 * maxn], lazy[4 * maxn];


    void build_tree(int root, int left, int right)
    {
        lazy[root] = 0;
        if (left == right)
        {
            tree[root] = values[left];
            return;
        }

        int mid = (left + right) / 2;
        build_tree(root * 2, left, mid);
        build_tree(root * 2 + 1, mid + 1, right);

        tree[root] = max(tree[root * 2], tree[root * 2 + 1]);
    }

    void push_lazy(int root, int left, int right)
    {
        tree[root] += lazy[root];
        if (left != right)
        {
            lazy[root * 2] += lazy[root];
            lazy[root * 2 + 1] += lazy[root];
        }

        lazy[root] = 0;
    }

    void update_range(int root, int left, int right, int qleft, int qright, ll val)
    {
        push_lazy(root, left, right);
        if (left > qright || right < qleft)
            return;

        if (left >= qleft && right <= qright)
        {
            lazy[root] += val;
            push_lazy(root, left, right);
            return;
        }

        int mid = (left + right) / 2;
        update_range(root * 2, left, mid, qleft, qright, val);
        update_range(root * 2 + 1, mid + 1, right, qleft, qright, val);

        tree[root] = max(tree[root * 2], tree[root * 2 + 1]);
    }

    ll walk_left(int root, int left, int right, int qleft, int qright, ll val)
    {
        push_lazy(root, left, right);
        if (left > qright || right < qleft || tree[root] <= val)
            return n + 1;

        if (left == right)
            return left;

        int mid = (left + right) / 2;
        if (left >= qleft && right <= qright)
        {
            if (tree[root * 2] > val)
                return walk_left(root * 2, left, mid, qleft, qright, val);
            return walk_left(root * 2 + 1, mid + 1, right, qleft, qright, val);
        }

        return min(walk_left(root * 2, left, mid, qleft, qright, val),
                walk_left(root * 2 + 1, mid + 1, right, qleft, qright, val));
    }

    ll walk_right(int root, int left, int right, int qleft, int qright, ll val)
    {
        push_lazy(root, left, right);
        if (left > qright || right < qleft || tree[root] <= val)
            return 0;

        if (left == right)
            return left;

        int mid = (left + right) / 2;
        if (left >= qleft && right <= qright)
        {
            if (tree[root * 2 + 1] > val)
                    return walk_right(root * 2 + 1, mid + 1, right, qleft, qright, val);
            return walk_right(root * 2, left, mid, qleft, qright, val);
        }

        return max(walk_right(root * 2, left, mid, qleft, qright, val),
                walk_right(root * 2 + 1, mid + 1, right, qleft, qright, val));
    }
};

segment_tree left_tree, right_tree;

ll fen[maxn];

void update_fen(int pos, ll val)
{
    for (int i = pos; i <= n; i += (i & -i))
        fen[i] += val;
}

ll query_fen(int pos)
{
    ll s = 0;
    for (int i = pos; i > 0; i -= (i & -i))
        s += fen[i];
    return s;
}

ll range_sum(int left, int right)
{
    return query_fen(right) - query_fen(left - 1);
}

void solve_query(int left, int right)
{



    int lb = left_tree.walk_right(1, 1, n, left, right, - query_fen(left - 1));
    int rb = right_tree.walk_left(1, 1, n, left, right, query_fen(right));


    cout << query(1, 1, n, lb, rb).cnt << endl;
}

void restructure()
{
    get_ranges();
    for (int i = 1; i <= n; i ++)
        b[i] = 0;
    for (pair < int, int > cur : ranges)
        for (int i = cur.first; i <= cur.second; i ++)
        b[i] ++;
    build_tree(1, 1, n);

    for (int i = 1; i <= n; i ++)
    {
        values[i] = a[i] + query_fen(i);
    }
    right_tree.build_tree(1, 1, n);

}
void simulate()
{
    for (int i = 1; i <= n; i ++)
        update_fen(i, a[i]);
    restructure();
    for (int i = 1; i <= n; i ++)
    {
        values[i] = a[i] - query_fen(i - 1);
    }
    left_tree.build_tree(1, 1, n);

    for (int i = 1; i <= q; i ++)
    {
        int type;
        cin >> type;
        if (type == 1)
        {
            int idx;
            ll x;
            cin >> idx >> x;
            update_fen(idx, x - a[idx]);
            left_tree.update_range(1, 1, n, idx + 1, n, - (x - a[idx]));
            left_tree.update_range(1, 1, n, idx, idx, (x - a[idx]));
            //right_tree.update_range(1, 1, n, idx, n, (x - a[idx]));
            //right_tree.update_range(1, 1, n, idx, idx, (x - a[idx]));
            a[idx] = x;
            restructure();
        }
        else
        {
            int l, r;
            cin >> l >> r;
            solve_query(l, r);
        }
    }
}
void solve()
{
    input();
    simulate();
}

void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
int main()
{
    speed();
    solve();
    return 0;
}
/*
12
32 32 4 1 1 1 1 4 4 16 32 128
1
2 8 10

*/

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14680 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Incorrect 9 ms 14844 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 16 ms 21204 KB Output is correct
3 Correct 15 ms 21072 KB Output is correct
4 Correct 16 ms 21228 KB Output is correct
5 Correct 15 ms 21200 KB Output is correct
6 Correct 18 ms 20692 KB Output is correct
7 Correct 14 ms 20948 KB Output is correct
8 Correct 18 ms 20664 KB Output is correct
9 Correct 15 ms 20912 KB Output is correct
10 Correct 16 ms 20948 KB Output is correct
11 Correct 15 ms 21308 KB Output is correct
12 Correct 15 ms 20944 KB Output is correct
13 Correct 15 ms 20816 KB Output is correct
14 Correct 15 ms 20980 KB Output is correct
15 Correct 17 ms 20948 KB Output is correct

Subtask #3
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14680 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Incorrect 9 ms 14844 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 16 ms 21204 KB Output is correct
3 Correct 15 ms 21072 KB Output is correct
4 Correct 16 ms 21228 KB Output is correct
5 Correct 15 ms 21200 KB Output is correct
6 Correct 18 ms 20692 KB Output is correct
7 Correct 14 ms 20948 KB Output is correct
8 Correct 18 ms 20664 KB Output is correct
9 Correct 15 ms 20912 KB Output is correct
10 Correct 16 ms 20948 KB Output is correct
11 Correct 15 ms 21308 KB Output is correct
12 Correct 15 ms 20944 KB Output is correct
13 Correct 15 ms 20816 KB Output is correct
14 Correct 15 ms 20980 KB Output is correct
15 Correct 17 ms 20948 KB Output is correct
16 Correct 3 ms 14680 KB Output is correct
17 Correct 138 ms 21492 KB Output is correct
18 Correct 141 ms 21680 KB Output is correct
19 Correct 141 ms 21456 KB Output is correct
20 Correct 149 ms 21444 KB Output is correct
21 Correct 148 ms 21444 KB Output is correct
22 Correct 132 ms 21704 KB Output is correct
23 Correct 142 ms 21648 KB Output is correct
24 Correct 150 ms 22212 KB Output is correct
25 Correct 143 ms 21444 KB Output is correct
26 Correct 146 ms 21448 KB Output is correct
27 Correct 130 ms 21448 KB Output is correct
28 Correct 132 ms 21272 KB Output is correct
29 Correct 126 ms 21452 KB Output is correct
30 Correct 134 ms 21044 KB Output is correct
31 Correct 136 ms 21096 KB Output is correct
32 Correct 156 ms 21444 KB Output is correct
33 Correct 132 ms 21448 KB Output is correct
34 Correct 160 ms 21448 KB Output is correct
35 Correct 147 ms 21944 KB Output is correct
36 Correct 139 ms 21708 KB Output is correct
37 Correct 119 ms 20944 KB Output is correct
38 Correct 123 ms 20960 KB Output is correct
39 Correct 156 ms 21660 KB Output is correct
40 Correct 118 ms 21708 KB Output is correct

Subtask #5
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 16 ms 21204 KB Output is correct
3 Correct 15 ms 21072 KB Output is correct
4 Correct 16 ms 21228 KB Output is correct
5 Correct 15 ms 21200 KB Output is correct
6 Correct 18 ms 20692 KB Output is correct
7 Correct 14 ms 20948 KB Output is correct
8 Correct 18 ms 20664 KB Output is correct
9 Correct 15 ms 20912 KB Output is correct
10 Correct 16 ms 20948 KB Output is correct
11 Correct 15 ms 21308 KB Output is correct
12 Correct 15 ms 20944 KB Output is correct
13 Correct 15 ms 20816 KB Output is correct
14 Correct 15 ms 20980 KB Output is correct
15 Correct 17 ms 20948 KB Output is correct
16 Correct 2 ms 14684 KB Output is correct
17 Execution timed out 4077 ms 21096 KB Time limit exceeded
18 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14680 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Incorrect 9 ms 14844 KB Output isn't correct
6 Halted 0 ms 0 KB -