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답안 #594643

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
594643 2022-07-12T18:51:51 Z penguinhacker Safety (NOI18_safety) C++17
100 / 100
 439 ms 21724 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ar array

mt19937 rng(42);

struct Node {
	int sz=1, pri=rng();
	ll val=0, lz=0;
	Node *left=nullptr, *right=nullptr;
	Node(ll x) : val(x) {}
};

int sz(Node* u) {
	return u?u->sz:0;
}

Node* cmb(Node* u) {
	u->sz=1+sz(u->left)+sz(u->right);
	return u;
}

void psh(Node* u) {
	if (u&&u->lz) {
		u->val+=u->lz;
		if (u->left)
			u->left->lz+=u->lz;
		if (u->right)
			u->right->lz+=u->lz;
		u->lz=0;
	}
}

ar<Node*, 2> split1(Node* u, int k) {
	if (!u)
		return {nullptr, nullptr};
	psh(u);
	if (sz(u->left)>=k) {
		ar<Node*, 2> x=split1(u->left, k);
		u->left=x[1];
		return {x[0], cmb(u)};
	} else {
		ar<Node*, 2> x=split1(u->right, k-sz(u->left)-1);
		u->right=x[0];
		return {cmb(u), x[1]};
	}
}

ar<Node*, 2> split2(Node* u, ll k) {
	if (!u)
		return {nullptr, nullptr};
	psh(u);
	if (u->val>k) {
		ar<Node*, 2> x=split2(u->left, k);
		u->left=x[1];
		return {x[0], cmb(u)};
	} else {
		ar<Node*, 2> x=split2(u->right, k);
		u->right=x[0];
		return {cmb(u), x[1]};
	}
}

Node* mrg(Node* u, Node* v) {
	psh(u), psh(v);
	if (!u||!v)
		return u?u:v;
	if (u->pri>v->pri) {
		u->right=mrg(u->right, v);
		return cmb(u);
	} else {
		v->left=mrg(u, v->left);
		return cmb(v);
	}
}

void app(Node* u, ll x) {
	assert(u);
	u->lz+=x;
	psh(u);
}

ll walk(Node* u, int dir) {
	while(1) {
		psh(u);
		Node* nxt=dir==0?u->left:u->right;
		if (nxt)
			u=nxt;
		else
			break;
	}
	return u->val;
}

const int mxN=2e5;
int n, h, a[mxN];

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n >> h;
	for (int i=0; i<n; ++i)
		cin >> a[i];
	ll ans=0;
	Node* rt=mrg(new Node(a[0]), new Node(a[0]));
	for (int i=1; i<n; ++i) {
		ar<Node*, 2> x=split1(rt, i);
		app(x[0], -h);
		app(x[1], h);
		ll bound=walk(x[0], 1);
		if (a[i]<bound)
			ans+=bound-a[i];
		else {
			bound=walk(x[1], 0);
			if (a[i]>bound)
				ans+=a[i]-bound;
		}
		rt=mrg(x[0], x[1]);
		x=split2(rt, a[i]);
		rt=mrg(mrg(x[0], new Node(a[i])), mrg(new Node(a[i]), x[1]));
	}
	cout << ans;
	return 0;
}

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 212 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 0 ms 212 KB Output is correct

Subtask #4
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 276 ms 13536 KB Output is correct
2 Correct 361 ms 20420 KB Output is correct
3 Correct 360 ms 21196 KB Output is correct

Subtask #5
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct

Subtask #6
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct

Subtask #7
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 7 ms 728 KB Output is correct
29 Correct 5 ms 764 KB Output is correct
30 Correct 8 ms 736 KB Output is correct
31 Correct 6 ms 724 KB Output is correct
32 Correct 5 ms 728 KB Output is correct
33 Correct 6 ms 732 KB Output is correct
34 Correct 6 ms 732 KB Output is correct

Subtask #8
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 2 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 7 ms 728 KB Output is correct
35 Correct 5 ms 764 KB Output is correct
36 Correct 8 ms 736 KB Output is correct
37 Correct 6 ms 724 KB Output is correct
38 Correct 5 ms 728 KB Output is correct
39 Correct 6 ms 732 KB Output is correct
40 Correct 6 ms 732 KB Output is correct
41 Correct 6 ms 780 KB Output is correct
42 Correct 4 ms 808 KB Output is correct
43 Correct 5 ms 724 KB Output is correct
44 Correct 5 ms 860 KB Output is correct
45 Correct 5 ms 724 KB Output is correct
46 Correct 5 ms 716 KB Output is correct

Subtask #9
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 276 ms 13536 KB Output is correct
20 Correct 361 ms 20420 KB Output is correct
21 Correct 360 ms 21196 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 2 ms 340 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 7 ms 728 KB Output is correct
38 Correct 5 ms 764 KB Output is correct
39 Correct 8 ms 736 KB Output is correct
40 Correct 6 ms 724 KB Output is correct
41 Correct 5 ms 728 KB Output is correct
42 Correct 6 ms 732 KB Output is correct
43 Correct 6 ms 732 KB Output is correct
44 Correct 6 ms 780 KB Output is correct
45 Correct 4 ms 808 KB Output is correct
46 Correct 5 ms 724 KB Output is correct
47 Correct 5 ms 860 KB Output is correct
48 Correct 5 ms 724 KB Output is correct
49 Correct 5 ms 716 KB Output is correct
50 Correct 439 ms 21724 KB Output is correct
51 Correct 304 ms 17992 KB Output is correct
52 Correct 260 ms 17344 KB Output is correct
53 Correct 254 ms 20172 KB Output is correct
54 Correct 276 ms 20824 KB Output is correct
55 Correct 236 ms 17716 KB Output is correct
56 Correct 239 ms 19452 KB Output is correct
57 Correct 218 ms 17844 KB Output is correct
58 Correct 182 ms 14968 KB Output is correct
59 Correct 320 ms 19716 KB Output is correct