oj.uz

답안 #876476

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
876476 2023-11-21T19:26:18 Z danikoynov Fish 2 (JOI22_fish2) C++14
36 / 100
 4000 ms 21848 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);

        for (int i = 1; i <= n; i ++)
    {
        values[i] = a[i] - query_fen(i - 1);
    }
    left_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 <= 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
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 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 Correct 10 ms 14680 KB Output is correct
6 Correct 4 ms 14680 KB Output is correct
7 Correct 11 ms 14860 KB Output is correct
8 Correct 7 ms 14680 KB Output is correct
9 Correct 5 ms 14680 KB Output is correct
10 Correct 8 ms 14864 KB Output is correct
11 Correct 3 ms 14936 KB Output is correct
12 Correct 11 ms 14684 KB Output is correct
13 Correct 5 ms 14684 KB Output is correct
14 Correct 10 ms 14864 KB Output is correct
15 Correct 8 ms 14680 KB Output is correct
16 Correct 4 ms 14680 KB Output is correct
17 Correct 9 ms 14684 KB Output is correct
18 Correct 3 ms 14848 KB Output is correct
19 Correct 9 ms 14936 KB Output is correct
20 Correct 4 ms 14816 KB Output is correct

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 21000 KB Output is correct
3 Correct 14 ms 21268 KB Output is correct
4 Correct 16 ms 21200 KB Output is correct
5 Correct 15 ms 21204 KB Output is correct
6 Correct 18 ms 20688 KB Output is correct
7 Correct 14 ms 20820 KB Output is correct
8 Correct 20 ms 20688 KB Output is correct
9 Correct 14 ms 20948 KB Output is correct
10 Correct 16 ms 20948 KB Output is correct
11 Correct 15 ms 21208 KB Output is correct
12 Correct 15 ms 20692 KB Output is correct
13 Correct 15 ms 20692 KB Output is correct
14 Correct 15 ms 21136 KB Output is correct
15 Correct 17 ms 20952 KB Output is correct

Subtask #3
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 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 Correct 10 ms 14680 KB Output is correct
6 Correct 4 ms 14680 KB Output is correct
7 Correct 11 ms 14860 KB Output is correct
8 Correct 7 ms 14680 KB Output is correct
9 Correct 5 ms 14680 KB Output is correct
10 Correct 8 ms 14864 KB Output is correct
11 Correct 3 ms 14936 KB Output is correct
12 Correct 11 ms 14684 KB Output is correct
13 Correct 5 ms 14684 KB Output is correct
14 Correct 10 ms 14864 KB Output is correct
15 Correct 8 ms 14680 KB Output is correct
16 Correct 4 ms 14680 KB Output is correct
17 Correct 9 ms 14684 KB Output is correct
18 Correct 3 ms 14848 KB Output is correct
19 Correct 9 ms 14936 KB Output is correct
20 Correct 4 ms 14816 KB Output is correct
21 Correct 2 ms 14684 KB Output is correct
22 Correct 16 ms 21000 KB Output is correct
23 Correct 14 ms 21268 KB Output is correct
24 Correct 16 ms 21200 KB Output is correct
25 Correct 15 ms 21204 KB Output is correct
26 Correct 18 ms 20688 KB Output is correct
27 Correct 14 ms 20820 KB Output is correct
28 Correct 20 ms 20688 KB Output is correct
29 Correct 14 ms 20948 KB Output is correct
30 Correct 16 ms 20948 KB Output is correct
31 Correct 15 ms 21208 KB Output is correct
32 Correct 15 ms 20692 KB Output is correct
33 Correct 15 ms 20692 KB Output is correct
34 Correct 15 ms 21136 KB Output is correct
35 Correct 17 ms 20952 KB Output is correct
36 Correct 2641 ms 21848 KB Output is correct
37 Correct 1693 ms 21624 KB Output is correct
38 Correct 286 ms 21460 KB Output is correct
39 Correct 3953 ms 21840 KB Output is correct
40 Correct 301 ms 21552 KB Output is correct
41 Correct 1879 ms 21652 KB Output is correct
42 Correct 708 ms 21448 KB Output is correct
43 Correct 1836 ms 21220 KB Output is correct
44 Correct 606 ms 21200 KB Output is correct
45 Correct 2650 ms 21824 KB Output is correct
46 Correct 1659 ms 21704 KB Output is correct
47 Correct 294 ms 21460 KB Output is correct
48 Execution timed out 4050 ms 21188 KB Time limit exceeded
49 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 21000 KB Output is correct
3 Correct 14 ms 21268 KB Output is correct
4 Correct 16 ms 21200 KB Output is correct
5 Correct 15 ms 21204 KB Output is correct
6 Correct 18 ms 20688 KB Output is correct
7 Correct 14 ms 20820 KB Output is correct
8 Correct 20 ms 20688 KB Output is correct
9 Correct 14 ms 20948 KB Output is correct
10 Correct 16 ms 20948 KB Output is correct
11 Correct 15 ms 21208 KB Output is correct
12 Correct 15 ms 20692 KB Output is correct
13 Correct 15 ms 20692 KB Output is correct
14 Correct 15 ms 21136 KB Output is correct
15 Correct 17 ms 20952 KB Output is correct
16 Correct 2 ms 14684 KB Output is correct
17 Correct 144 ms 21452 KB Output is correct
18 Correct 134 ms 21776 KB Output is correct
19 Correct 140 ms 21448 KB Output is correct
20 Correct 162 ms 21736 KB Output is correct
21 Correct 143 ms 21584 KB Output is correct
22 Correct 131 ms 21704 KB Output is correct
23 Correct 155 ms 21720 KB Output is correct
24 Correct 145 ms 21656 KB Output is correct
25 Correct 144 ms 21448 KB Output is correct
26 Correct 183 ms 21628 KB Output is correct
27 Correct 158 ms 21396 KB Output is correct
28 Correct 164 ms 21204 KB Output is correct
29 Correct 163 ms 21428 KB Output is correct
30 Correct 171 ms 21268 KB Output is correct
31 Correct 152 ms 21188 KB Output is correct
32 Correct 174 ms 21620 KB Output is correct
33 Correct 149 ms 21620 KB Output is correct
34 Correct 176 ms 21608 KB Output is correct
35 Correct 167 ms 21372 KB Output is correct
36 Correct 149 ms 21640 KB Output is correct
37 Correct 122 ms 21208 KB Output is correct
38 Correct 116 ms 21000 KB Output is correct
39 Correct 129 ms 21448 KB Output is correct
40 Correct 119 ms 21660 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 21000 KB Output is correct
3 Correct 14 ms 21268 KB Output is correct
4 Correct 16 ms 21200 KB Output is correct
5 Correct 15 ms 21204 KB Output is correct
6 Correct 18 ms 20688 KB Output is correct
7 Correct 14 ms 20820 KB Output is correct
8 Correct 20 ms 20688 KB Output is correct
9 Correct 14 ms 20948 KB Output is correct
10 Correct 16 ms 20948 KB Output is correct
11 Correct 15 ms 21208 KB Output is correct
12 Correct 15 ms 20692 KB Output is correct
13 Correct 15 ms 20692 KB Output is correct
14 Correct 15 ms 21136 KB Output is correct
15 Correct 17 ms 20952 KB Output is correct
16 Correct 3 ms 14936 KB Output is correct
17 Execution timed out 4078 ms 21036 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 14684 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 Correct 10 ms 14680 KB Output is correct
6 Correct 4 ms 14680 KB Output is correct
7 Correct 11 ms 14860 KB Output is correct
8 Correct 7 ms 14680 KB Output is correct
9 Correct 5 ms 14680 KB Output is correct
10 Correct 8 ms 14864 KB Output is correct
11 Correct 3 ms 14936 KB Output is correct
12 Correct 11 ms 14684 KB Output is correct
13 Correct 5 ms 14684 KB Output is correct
14 Correct 10 ms 14864 KB Output is correct
15 Correct 8 ms 14680 KB Output is correct
16 Correct 4 ms 14680 KB Output is correct
17 Correct 9 ms 14684 KB Output is correct
18 Correct 3 ms 14848 KB Output is correct
19 Correct 9 ms 14936 KB Output is correct
20 Correct 4 ms 14816 KB Output is correct
21 Correct 2 ms 14684 KB Output is correct
22 Correct 16 ms 21000 KB Output is correct
23 Correct 14 ms 21268 KB Output is correct
24 Correct 16 ms 21200 KB Output is correct
25 Correct 15 ms 21204 KB Output is correct
26 Correct 18 ms 20688 KB Output is correct
27 Correct 14 ms 20820 KB Output is correct
28 Correct 20 ms 20688 KB Output is correct
29 Correct 14 ms 20948 KB Output is correct
30 Correct 16 ms 20948 KB Output is correct
31 Correct 15 ms 21208 KB Output is correct
32 Correct 15 ms 20692 KB Output is correct
33 Correct 15 ms 20692 KB Output is correct
34 Correct 15 ms 21136 KB Output is correct
35 Correct 17 ms 20952 KB Output is correct
36 Correct 2641 ms 21848 KB Output is correct
37 Correct 1693 ms 21624 KB Output is correct
38 Correct 286 ms 21460 KB Output is correct
39 Correct 3953 ms 21840 KB Output is correct
40 Correct 301 ms 21552 KB Output is correct
41 Correct 1879 ms 21652 KB Output is correct
42 Correct 708 ms 21448 KB Output is correct
43 Correct 1836 ms 21220 KB Output is correct
44 Correct 606 ms 21200 KB Output is correct
45 Correct 2650 ms 21824 KB Output is correct
46 Correct 1659 ms 21704 KB Output is correct
47 Correct 294 ms 21460 KB Output is correct
48 Execution timed out 4050 ms 21188 KB Time limit exceeded
49 Halted 0 ms 0 KB -