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답안 #876499

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
876499 2023-11-21T20:41:45 Z danikoynov Fish 2 (JOI22_fish2) C++14
31 / 100
 4000 ms 56148 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;

}

struct interval
{
    int left, right, pivot;

    interval(int _left = 0, int _right = 0, int _pivot = 0)
    {
        left = _left;
        right = _right;
        pivot = _pivot;
    }
    bool operator < (const interval &it) const
    {
        if (left != it.left)
            return left < it.left;
        if (right != it.right)
            return right < it.right;
        ///assert(pivot != it.pivot);
        return pivot < it.pivot;
    }
};

set < interval > ranges;
vector < interval > act[4 * maxn];

void add_range(int root, int left, int right, int qleft, int qright, interval cur)
{
    if (left > qright || right < qleft)
        return;

    if (left >= qleft && right <= qright)
    {
        //cout << "ROOT " << root << endl;
        act[root].push_back(cur);

        return;
    }

    int mid = (left + right) / 2;
    add_range(root * 2, left, mid, qleft, qright, cur);
    add_range(root * 2 + 1, mid + 1, right, qleft, qright, cur);
}

void rem_range(int root, int left, int right, int qleft, int qright, interval cur)
{
    if (left > qright || right < qleft)
        return;

    if (left >= qleft && right <= qright)
    {
        /**if (act[root].back().left != cur.left || act[root].back().right != cur.right ||
                act[root].back().pivot != cur.pivot)
        {
            cout << "Alert!!!" << endl;
            cout << act[root].back().left <<  " : " << act[root].back().right << " : " << act[root].back().pivot << endl;
            exit(0);
        }*/
        //if (act[root].size() == 0)
          //  cout << "FUCK " << root << endl;
        assert(act[root].size() > 0);
        act[root].pop_back();
        return;
    }

    int mid = (left + right) / 2;
    rem_range(root * 2, left, mid, qleft, qright, cur);
    rem_range(root * 2 + 1, mid + 1, right, qleft, qright, cur);
}

bool cmp_interval(const interval &it1, const interval &it2)
{
    if ((it1.right - it1.left) != (it2.right - it2.left))
        return (it1.right - it1.left) < (it2.right - it2.left);
    if (it1.left != it2.left)
        return it1.left < it2.left;
    if (it1.right != it2.right)
        return it1.right < it2.right;
    if (it1.pivot == it2.pivot)
        while(true);
    return (it1.pivot < it2.pivot);
}

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

        ranges.insert(interval(st.top(), i, i));
        vec.push_back(interval(st.top(), i, i));


        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();

        ranges.insert(interval(i, st.top(), i));
        vec.push_back(interval(i, st.top(), i));

        st.push(i);
    }

    sort(vec.begin(), vec.end(), cmp_interval);
    ///reverse(vec.begin(), vec.end());
    for (interval cur : vec)
    {
        //cout << "added " << cur.left << " " << cur.right << endl;
        add_range(1, 0, n + 1, cur.left, cur.right, cur);
    }
}

int b[maxn];

struct node
{
    int cnt, mx;

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

node tree[4 * maxn];
int lazy[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 push_lazy(int root, int left, int right)
{
    tree[root].mx += lazy[root];
    if (left != right)
    {
        lazy[root * 2] += lazy[root];
        lazy[root * 2 + 1] += lazy[root];
    }
    lazy[root] = 0;
}

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

void update_range(int root, int left, int right, int qleft, int qright, int 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] = merge_node(tree[root * 2], tree[root * 2 + 1]);
}
node query(int root, int left, int right, int qleft, int qright)
{
    push_lazy(root, left, right);
    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)
        {
            push_lazy(root * 2, left, mid);
            push_lazy(root * 2 + 1, mid + 1, right);
            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)
        {
            push_lazy(root * 2, left, mid);
            push_lazy(root * 2 + 1, mid + 1, right);
            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()
{
    ///cout << "-------------" << endl;

    build_tree(1, 1, n);
    for (interval cur : ranges)
    {
        ll mx = min(a[cur.left], a[cur.right]);
        if (range_sum(cur.left + 1, cur.right - 1) < mx)
        {
            update_range(1, 1, n, cur.left + 1, cur.right - 1, 1);
            ///cout << cur.left << " " << cur.right << endl;
            //for (int i = cur.left + 1; i < cur.right; i ++)
              //  b[i] ++;
        }
    }
}



void fix_point(int pos)
{

    vector < pair < int, int > > to_fix;
    int root = 1, left = 0, right = n + 1;
    vector < interval > to_rem;
    while(true)
    {
        for (interval cur : act[root])
        {
            to_rem.push_back(cur);
            if (cur.pivot == cur.left)
                to_fix.push_back({cur.pivot, 0});
            else
                to_fix.push_back({cur.pivot, 1});
        }
        if (left == right)
            break;
        int mid = (left + right) / 2;
        if (pos <= mid)
            right = mid, root *= 2;
        else
            left = mid + 1, root = (root * 2) + 1;
    }

    sort(to_rem.begin(), to_rem.end(), cmp_interval);
    reverse(to_rem.begin(), to_rem.end());
    for (interval cur : to_rem)
    {
        //cout << "remove " << cur.left << " " << cur.right << endl;
       // if (ranges.find(cur) == ranges.end())
          //  cout << "yep" << endl;
        ranges.erase(cur);
        rem_range(1, 0, n + 1, cur.left, cur.right, cur);
    }



    vector < interval > to_add;
    for (pair < int, int > cur : to_fix)
    {
        if (cur.second == 0)
        {
            int df = cur.first + 1;
            while(a[df] < a[cur.first])
                df ++;
            to_add.push_back(interval(cur.first, df, cur.first));
        }
        else
        {
            int df = cur.first - 1;
            while(a[df] < a[cur.first])
                df --;
            to_add.push_back(interval(df, cur.first, cur.first));
        }
    }

    sort(to_add.begin(), to_add.end(), cmp_interval);
    ///reverse(to_add.begin(), to_add.end());
    for (interval cur : to_add)
    {
        ranges.insert(cur);
        ///cout << "added " << cur.left << " : " << cur.right << endl;
        add_range(1, 0, n + 1, cur.left, cur.right, cur);
    }
}
void simulate()
{
    for (int i = 1; i <= n; i ++)
        update_fen(i, a[i]);
    get_ranges();
    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 <= n; i ++)
    {
        values[i] = a[i] + query_fen(i);
    }
    right_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;
            fix_point(idx);
            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 4 ms 24924 KB Output is correct
2 Correct 4 ms 24924 KB Output is correct
3 Correct 4 ms 24924 KB Output is correct
4 Correct 4 ms 24924 KB Output is correct
5 Correct 60 ms 25176 KB Output is correct
6 Execution timed out 4053 ms 25180 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 24924 KB Output is correct
2 Correct 165 ms 52716 KB Output is correct
3 Correct 169 ms 52800 KB Output is correct
4 Correct 164 ms 52676 KB Output is correct
5 Correct 166 ms 52628 KB Output is correct
6 Correct 166 ms 52336 KB Output is correct
7 Correct 149 ms 51140 KB Output is correct
8 Correct 145 ms 52160 KB Output is correct
9 Correct 147 ms 51312 KB Output is correct
10 Correct 165 ms 55748 KB Output is correct
11 Correct 163 ms 52796 KB Output is correct
12 Correct 144 ms 51824 KB Output is correct
13 Correct 144 ms 51992 KB Output is correct
14 Correct 144 ms 51712 KB Output is correct
15 Correct 156 ms 51884 KB Output is correct

Subtask #3
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 24924 KB Output is correct
2 Correct 4 ms 24924 KB Output is correct
3 Correct 4 ms 24924 KB Output is correct
4 Correct 4 ms 24924 KB Output is correct
5 Correct 60 ms 25176 KB Output is correct
6 Execution timed out 4053 ms 25180 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 24924 KB Output is correct
2 Correct 165 ms 52716 KB Output is correct
3 Correct 169 ms 52800 KB Output is correct
4 Correct 164 ms 52676 KB Output is correct
5 Correct 166 ms 52628 KB Output is correct
6 Correct 166 ms 52336 KB Output is correct
7 Correct 149 ms 51140 KB Output is correct
8 Correct 145 ms 52160 KB Output is correct
9 Correct 147 ms 51312 KB Output is correct
10 Correct 165 ms 55748 KB Output is correct
11 Correct 163 ms 52796 KB Output is correct
12 Correct 144 ms 51824 KB Output is correct
13 Correct 144 ms 51992 KB Output is correct
14 Correct 144 ms 51712 KB Output is correct
15 Correct 156 ms 51884 KB Output is correct
16 Correct 4 ms 24920 KB Output is correct
17 Correct 326 ms 53012 KB Output is correct
18 Correct 307 ms 52772 KB Output is correct
19 Correct 325 ms 52992 KB Output is correct
20 Correct 328 ms 52764 KB Output is correct
21 Correct 323 ms 52820 KB Output is correct
22 Correct 310 ms 52724 KB Output is correct
23 Correct 316 ms 52676 KB Output is correct
24 Correct 325 ms 52932 KB Output is correct
25 Correct 336 ms 52960 KB Output is correct
26 Correct 326 ms 52932 KB Output is correct
27 Correct 275 ms 52876 KB Output is correct
28 Correct 284 ms 52660 KB Output is correct
29 Correct 286 ms 52752 KB Output is correct
30 Correct 305 ms 51548 KB Output is correct
31 Correct 295 ms 51404 KB Output is correct
32 Correct 340 ms 53104 KB Output is correct
33 Correct 303 ms 56148 KB Output is correct
34 Correct 336 ms 52708 KB Output is correct
35 Correct 310 ms 52132 KB Output is correct
36 Correct 313 ms 56000 KB Output is correct
37 Correct 274 ms 52012 KB Output is correct
38 Correct 270 ms 52020 KB Output is correct
39 Correct 304 ms 52584 KB Output is correct
40 Correct 275 ms 52368 KB Output is correct

Subtask #5
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 24924 KB Output is correct
2 Correct 165 ms 52716 KB Output is correct
3 Correct 169 ms 52800 KB Output is correct
4 Correct 164 ms 52676 KB Output is correct
5 Correct 166 ms 52628 KB Output is correct
6 Correct 166 ms 52336 KB Output is correct
7 Correct 149 ms 51140 KB Output is correct
8 Correct 145 ms 52160 KB Output is correct
9 Correct 147 ms 51312 KB Output is correct
10 Correct 165 ms 55748 KB Output is correct
11 Correct 163 ms 52796 KB Output is correct
12 Correct 144 ms 51824 KB Output is correct
13 Correct 144 ms 51992 KB Output is correct
14 Correct 144 ms 51712 KB Output is correct
15 Correct 156 ms 51884 KB Output is correct
16 Correct 4 ms 24920 KB Output is correct
17 Execution timed out 4035 ms 52824 KB Time limit exceeded
18 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 24924 KB Output is correct
2 Correct 4 ms 24924 KB Output is correct
3 Correct 4 ms 24924 KB Output is correct
4 Correct 4 ms 24924 KB Output is correct
5 Correct 60 ms 25176 KB Output is correct
6 Execution timed out 4053 ms 25180 KB Time limit exceeded
7 Halted 0 ms 0 KB -