oj.uz

답안 #1091225

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1091225 2024-09-20T07:47:41 Z tibinyte Safety (NOI18_safety) C++17
100 / 100
 730 ms 28208 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int random(int st, int dr)
{
    uniform_int_distribution<int> dist(st, dr);
    return dist(rng);
}

template <typename t>
using ordered_set = tree<t, null_type, less<t>, rb_tree_tag, tree_order_statistics_node_update>;

const int mod = 1e9 + 7;
struct Mint
{
    int val;
    Mint(int x = 0)
    {
        val = x % mod;
    }
    Mint(long long x)
    {
        val = x % mod;
    }
    Mint operator+(Mint oth)
    {
        return val + oth.val;
    }
    Mint operator-(Mint oth)
    {
        return val - oth.val + mod;
    }
    Mint operator*(Mint oth)
    {
        return 1ll * val * oth.val;
    }
    void operator+=(Mint oth)
    {
        val = (*this + oth).val;
    }
    void operator-=(Mint oth)
    {
        val = (*this - oth).val;
    }
    void operator*=(Mint oth)
    {
        val = (*this * oth).val;
    }
};

Mint powmod(int a, int b)
{
    if (b == 0)
    {
        return 1;
    }
    if (b % 2 == 1)
    {
        return powmod(a, b - 1) * a;
    }
    Mint p = powmod(a, b / 2);
    return p * p;
}

/*
                 .___                 __                 __           .__
  ____  ____   __| _/____     _______/  |______ ________/  |_  ______ |  |__   ___________   ____
_/ ___\/  _ \ / __ |/ __ \   /  ___/\   __\__  \\_  __ \   __\/  ___/ |  |  \_/ __ \_  __ \_/ __ \
\  \__(  <_> ) /_/ \  ___/   \___ \  |  |  / __ \|  | \/|  |  \___ \  |   Y  \  ___/|  | \/\  ___/
 \___  >____/\____ |\___  > /____  > |__| (____  /__|   |__| /____  > |___|  /\___  >__|    \___  >
     \/           \/    \/       \/            \/                 \/       \/     \/            \/
*/

#define int long long

struct treap // implicit key treap
{
    int prior, val, cnt;
    int maxi, lazy;
    treap *l, *r;
    treap(int val = 0) : val(val), lazy(0), prior(random(1, 1e9)), cnt(1), l(nullptr), r(nullptr), maxi(val) {}
};

int cnt(treap *t)
{
    return t ? t->cnt : 0;
}

void push(treap *&t)
{
    if (t && t->lazy)
    {
        t->maxi += t->lazy;
        t->val += t->lazy;
        if (t->l)
        {
            t->l->lazy += t->lazy;
        }
        if (t->r)
        {
            t->r->lazy += t->lazy;
        }
        t->lazy = 0;
    }
}

void pull(treap *&t)
{
    if (t)
    {
        assert(t->lazy == 0);
        push(t->l);
        push(t->r);
        t->cnt = cnt(t->l) + cnt(t->r) + 1;
        t->maxi = t->val;
        if (t->l)
        {
            t->maxi = max(t->maxi, t->l->maxi);
        }
        if (t->r)
        {
            t->maxi = max(t->maxi, t->r->maxi);
        }
    }
}

void merge(treap *&t, treap *l, treap *r)
{
    push(l), push(r);
    if (!l || !r)
    {
        t = (l ? l : r);
        return;
    }
    if (r->prior > l->prior)
    {
        merge(r->l, l, r->l);
        t = r;
    }
    else
    {
        merge(l->r, l->r, r);
        t = l;
    }
    pull(t);
}

void split(treap *t, treap *&l, treap *&r, int key, int add = 0)
{
    push(t);
    if (!t)
    {
        l = r = nullptr;
        return;
    }
    int curr_key = add + cnt(t->l) + 1;
    if (curr_key <= key)
    {
        split(t->r, t->r, r, key, add + cnt(t->l) + 1);
        l = t;
    }
    else
    {
        split(t->l, l, t->l, key, add);
        r = t;
    }
    pull(t);
}

int find_rank(treap *&t, int x)
{
    push(t);
    pull(t);
    if (!t || t->maxi < x)
    {
        return cnt(t);
    }
    if (t->l)
    {
        if (t->l->maxi > x)
        {
            return find_rank(t->l, x);
        }
    }
    if (t->val > x)
    {
        return cnt(t->l);
    }
    return cnt(t->l) + 1 + find_rank(t->r, x);
}

void insert(treap *&t, int x)
{
    treap *a, *b;
    a = b = nullptr;

    int my_rank = find_rank(t, x);

    split(t, a, b, my_rank);
    merge(a, a, new treap(x));
    merge(t, a, b);
}

void move(treap *&t, int pref, int h)
{
    treap *a, *b;
    a = b = nullptr;
    split(t, a, b, pref);
    if (b)
        b->lazy += h;
    if (a)
        a->lazy -= h;
    merge(t, a, b);
}

int pop(treap *&t)
{
    assert(cnt(t) >= 1);
    int ans = t->maxi;
    treap *lying = nullptr;
    split(t, t, lying, cnt(t) - 1);
    return ans;
}

struct line
{
    int a, b;
    line(int a = 0, int b = 0) : a(a), b(b) {}
    int eval(int x)
    {
        return a * x + b;
    }
    line operator+(line oth)
    {
        return line(a + oth.a, b + oth.b);
    }
};

struct slope_trick
{
    treap *t = nullptr;
    line rightmost;

    void shift(int dist)
    {
        move(t, cnt(t) - rightmost.a, dist);
        rightmost.b = rightmost.b - rightmost.a * dist;
    }

    void clean()
    {
        while (rightmost.a > 0)
        {
            int nxt = pop(t);
            rightmost = line(rightmost.a - 1, nxt + rightmost.b);
        }
    }

    void add(int x)
    {
        insert(t, x);
        insert(t, x);
        rightmost = rightmost + line(1, -x);
    }

    int getOpt()
    {
        clean();
        return rightmost.b;
    }
};

int32_t main()
{
    cin.tie(nullptr)->sync_with_stdio(false);
    int n, h;
    cin >> n >> h;
    vector<int> a(n + 1);
    slope_trick adam;
    for (int i = 1; i <= n; ++i)
    {
        cin >> a[i];
        adam.shift(h);
        adam.add(a[i]);
    }
    cout << adam.getOpt() << '\n';
}
/*
I cannot take this anymore
Saying everything I've said before
All these words, they make no sense
I find bliss in ignorance
Less I hear, the less you say
You'll find that out anyway
Just like before

Everything you say to me
(Takes me one step closer to the edge)
(And I'm about to break)
I need a little room to breathe
(Cause I'm one step closer to the edge)
(I'm about to break)
*/

Compilation message

safety.cpp: In constructor 'treap::treap(long long int)':
safety.cpp:88:15: warning: 'treap::lazy' will be initialized after [-Wreorder]
   88 |     int maxi, lazy;
      |               ^~~~
safety.cpp:87:9: warning:   'long long int treap::prior' [-Wreorder]
   87 |     int prior, val, cnt;
      |         ^~~~~
safety.cpp:90:5: warning:   when initialized here [-Wreorder]
   90 |     treap(int val = 0) : val(val), lazy(0), prior(random(1, 1e9)), cnt(1), l(nullptr), r(nullptr), maxi(val) {}
      |     ^~~~~
safety.cpp:89:16: warning: 'treap::r' will be initialized after [-Wreorder]
   89 |     treap *l, *r;
      |                ^
safety.cpp:88:9: warning:   'long long int treap::maxi' [-Wreorder]
   88 |     int maxi, lazy;
      |         ^~~~
safety.cpp:90:5: warning:   when initialized here [-Wreorder]
   90 |     treap(int val = 0) : val(val), lazy(0), prior(random(1, 1e9)), cnt(1), l(nullptr), r(nullptr), maxi(val) {}
      |     ^~~~~

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 0 ms 464 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 352 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #4
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 437 ms 18516 KB Output is correct
2 Correct 647 ms 26196 KB Output is correct
3 Correct 703 ms 27476 KB Output is correct

Subtask #5
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 460 KB Output is correct
12 Correct 0 ms 464 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct

Subtask #6
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 460 KB Output is correct
12 Correct 0 ms 464 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 2 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 352 KB Output is correct
27 Correct 1 ms 348 KB Output is correct

Subtask #7
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 460 KB Output is correct
12 Correct 0 ms 464 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 2 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 352 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 19 ms 1116 KB Output is correct
29 Correct 9 ms 988 KB Output is correct
30 Correct 10 ms 1120 KB Output is correct
31 Correct 8 ms 864 KB Output is correct
32 Correct 8 ms 860 KB Output is correct
33 Correct 12 ms 1116 KB Output is correct
34 Correct 12 ms 1116 KB Output is correct

Subtask #8
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 460 KB Output is correct
12 Correct 0 ms 464 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 352 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 460 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 2 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 352 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 19 ms 1116 KB Output is correct
35 Correct 9 ms 988 KB Output is correct
36 Correct 10 ms 1120 KB Output is correct
37 Correct 8 ms 864 KB Output is correct
38 Correct 8 ms 860 KB Output is correct
39 Correct 12 ms 1116 KB Output is correct
40 Correct 12 ms 1116 KB Output is correct
41 Correct 12 ms 1120 KB Output is correct
42 Correct 9 ms 944 KB Output is correct
43 Correct 10 ms 1120 KB Output is correct
44 Correct 11 ms 1124 KB Output is correct
45 Correct 10 ms 1096 KB Output is correct
46 Correct 9 ms 812 KB Output is correct

Subtask #9
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 460 KB Output is correct
12 Correct 0 ms 464 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 352 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 437 ms 18516 KB Output is correct
20 Correct 647 ms 26196 KB Output is correct
21 Correct 703 ms 27476 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 460 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 2 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 1 ms 352 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 19 ms 1116 KB Output is correct
38 Correct 9 ms 988 KB Output is correct
39 Correct 10 ms 1120 KB Output is correct
40 Correct 8 ms 864 KB Output is correct
41 Correct 8 ms 860 KB Output is correct
42 Correct 12 ms 1116 KB Output is correct
43 Correct 12 ms 1116 KB Output is correct
44 Correct 12 ms 1120 KB Output is correct
45 Correct 9 ms 944 KB Output is correct
46 Correct 10 ms 1120 KB Output is correct
47 Correct 11 ms 1124 KB Output is correct
48 Correct 10 ms 1096 KB Output is correct
49 Correct 9 ms 812 KB Output is correct
50 Correct 730 ms 28208 KB Output is correct
51 Correct 559 ms 23316 KB Output is correct
52 Correct 460 ms 22360 KB Output is correct
53 Correct 546 ms 26008 KB Output is correct
54 Correct 578 ms 26964 KB Output is correct
55 Correct 461 ms 22868 KB Output is correct
56 Correct 510 ms 25172 KB Output is correct
57 Correct 436 ms 23124 KB Output is correct
58 Correct 416 ms 19932 KB Output is correct
59 Correct 552 ms 25684 KB Output is correct