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Submission #851297

# Submission time Handle Problem Language Result Execution time Memory
851297 2023-09-19T12:41:23 Z Jawad_Akbar_JJ Fancy Fence (CEOI20_fancyfence) C++14
100 / 100
 112 ms 29808 KB 
#include <bits/stdc++.h>
 
using namespace std;
#define int long long
const int N = 1<<17;
int r[N][3];
int w[N];
int h[N];
int pre[N];
int ans = 0;
int mod = 1e9 + 7;

struct node{
	int l,r;
	node* left;
	node* right;
	int ind;
	bool lft,rgt;

	node(int ll,int rr){
		l = ll;
		r = rr;
		left = right = NULL;
		lft = rgt = false;
		ind = 0;
	}

	void insert(int i){
		if(i<l or i>=r)
			return;
		if (r-l==1){
			ind = i;
			return; 
		}
		if (!lft)
			left = new node(l,(l+r)/2);
		if (!rgt)
			right = new node((l+r)/2,r);
		lft = rgt = true;
		left->insert(i);
		right->insert(i);
		if (h[left->ind]<h[right->ind])
			ind = left->ind;
		else
			ind = right->ind;
	}

	int get(int ll,int rr){
		// if (ll==rr)
		// 	cout<<ll<<" "<<rr<<endl;
		ll = max(ll,l);
		rr = min(rr,r);
		if (ll>=r or rr<=l)
			return 0;
		if (l==ll and r==rr)
			return ind;
		int lind = 0;
		int rind = 0;
		if (lft)
			lind = left->get(ll,rr);
		if (rgt)
			rind = right->get(ll,rr);
		if (h[lind]<h[rind])
			return lind;
		return rind;
	}
};
 
int asd(int a){
	int b = a+1;
	if (a%2)
		b /= 2;
	else
		a /= 2;
	return (a*b)%mod;
}

int answer(int W,int H){
	int ans = asd(W);
	int ans2 = asd(H);
	return (ans*ans2)%mod ;
}
node* root;
void solve(int l,int r,int height){
	if (r<l or l>r)
		return;
	int ind = root->get(l,r+1);
	int width = pre[r]-pre[l-1];
	if (width<0)
		width += mod;
	ans -= answer(width,height);
	if (ans<0)
		ans += mod;
	ans += answer(width,h[ind]);
	ans %= mod;
	solve(l,ind-1,h[ind]);
	solve(ind+1,r,h[ind]);
}

signed main(){
	h[0] = 2e9;
	root = new node(1,N+1);
	int n;
	cin>>n;
	for (int i=1;i<=n;i++){
		cin>>h[i];
		root->insert(i);
	}
	for (int i=1;i<=n;i++){
		cin>>w[i];
		pre[i] = pre[i-1] + w[i];
		pre[i] %= mod;
	}
	solve(1LL,n,0LL);

	cout<<ans<<endl;

}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2440 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 42 ms 13432 KB Output is correct
4 Correct 84 ms 27032 KB Output is correct
5 Correct 85 ms 22100 KB Output is correct
6 Correct 77 ms 18348 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 12 ms 4952 KB Output is correct
3 Correct 51 ms 16968 KB Output is correct
4 Correct 100 ms 29600 KB Output is correct
5 Correct 103 ms 29504 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 10 ms 4956 KB Output is correct
4 Correct 51 ms 17040 KB Output is correct
5 Correct 102 ms 29628 KB Output is correct
6 Correct 112 ms 29808 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 11 ms 3820 KB Output is correct
9 Correct 54 ms 14604 KB Output is correct
10 Correct 94 ms 17100 KB Output is correct
11 Correct 96 ms 17184 KB Output is correct
12 Correct 0 ms 2392 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 2 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 2 ms 2392 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 2 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 2 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 42 ms 13472 KB Output is correct
12 Correct 84 ms 27220 KB Output is correct
13 Correct 81 ms 22024 KB Output is correct
14 Correct 80 ms 18256 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 10 ms 4968 KB Output is correct
17 Correct 56 ms 17012 KB Output is correct
18 Correct 103 ms 29688 KB Output is correct
19 Correct 101 ms 29532 KB Output is correct
20 Correct 1 ms 2408 KB Output is correct
21 Correct 10 ms 3728 KB Output is correct
22 Correct 53 ms 14680 KB Output is correct
23 Correct 107 ms 16992 KB Output is correct
24 Correct 96 ms 16996 KB Output is correct
25 Correct 1 ms 2408 KB Output is correct
26 Correct 1 ms 2404 KB Output is correct
27 Correct 2 ms 2408 KB Output is correct
28 Correct 1 ms 2408 KB Output is correct
29 Correct 2 ms 2548 KB Output is correct
30 Correct 10 ms 3688 KB Output is correct
31 Correct 10 ms 3688 KB Output is correct
32 Correct 52 ms 10848 KB Output is correct
33 Correct 47 ms 10952 KB Output is correct
34 Correct 93 ms 17212 KB Output is correct
35 Correct 91 ms 17160 KB Output is correct
36 Correct 95 ms 17080 KB Output is correct
37 Correct 100 ms 17288 KB Output is correct
38 Correct 1 ms 2392 KB Output is correct
39 Correct 96 ms 17232 KB Output is correct
40 Correct 96 ms 17184 KB Output is correct
41 Correct 97 ms 18468 KB Output is correct
42 Correct 102 ms 23380 KB Output is correct