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Submission #906432

# Submission time Handle Problem Language Result Execution time Memory
906432 2024-01-14T09:38:42 Z Nonoze Fancy Fence (CEOI20_fancyfence) C++17
73 / 100
 25 ms 6096 KB 
#include <bits/stdc++.h>

#define int long long
#define sz(x) (int)(x.size())

using namespace std;

const int mod=1000000007;

int MOD(int x) {
	return (x+3*mod)%mod;
}

struct sections {
	int H=0, W=0;
};

int n, k, m;
vector<sections> a;

int section(int h, int w) {
	h%=mod, w%=mod;
	int facteur=MOD((h*(h+1))/2);
	int ans=MOD((w*(w+1))/2);
	return MOD(ans*facteur);
}


int subtask2() {
	int ans=0;
	for (int i=0; i<n; i++) ans=MOD(ans+a[i].W);
	ans=MOD((ans*(ans+1))/2);
	for (int i=0; i<n; i++) {
		if (a[i].H==1) continue;
		ans=MOD(ans+section(1, a[i].W)*2);
	}
	return ans;
}

int subtask4() {
	int L=0;
	for (int i=0; i<n; i++) L+=a[i].W;
	int ans=0;
	for (int i=0; i<n; i++) {
		int sec=section(a[i].H, L);
		if (i) sec-=section(a[i-1].H, L);
		L-=a[i].W;
		ans=MOD(ans+MOD(sec));
	}
	return ans;
}

int subtask5() {
	int ans=0;
	for (int i=0; i<n; i++) {
		int mini=a[i].H;
		int sum=a[i].W;
		ans=MOD(ans+section(a[i].W, a[i].H)); //i=j
		for (int j=i+1; j<n; j++) { //i!=j
			mini=min(mini, a[j].H);
			int res=section(mini, sum); // toute la section entre i et j
			res-=MOD(section(mini, sum-a[i].W)+section(mini, sum-a[j].W)); // j'enlève tous les points qui ne commencent pas
			res=MOD(res);                                             // par j ou par i
			res+=section(mini, sum-a[i].W-a[j].W);                    // je rajoute ce que j'ai enlevé de trop (a+b)^2
			ans=MOD(ans+MOD(res));
		}
	}
	return ans;
}

int solve() {
	cin >> n;
	a.clear();
	a.resize(n);
	bool sub2=true;
	for (auto &u: a) {
		cin >> u.H;
		if (u.H>2) sub2=false;
	}
	for (auto &u: a) {
		cin >> u.W;
	}
	vector<sections> temp;
	for (int i=0; i<n; i++) {
		if (!temp.empty() && a[i].H==temp.back().H) temp.back().W+=a[i].W;
		else temp.push_back(a[i]);
	}
	a.clear();
	a=temp;
	n=a.size();
	if (sub2) return subtask2();
	if (n<=1000) return subtask5();
	return subtask4();
}


signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout << solve() << endl;
	return 0;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 11 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 11 ms 2392 KB Output is correct
4 Correct 13 ms 3800 KB Output is correct
5 Correct 21 ms 4316 KB Output is correct
6 Correct 13 ms 3688 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 8 ms 1116 KB Output is correct
4 Correct 19 ms 2032 KB Output is correct
5 Correct 16 ms 2036 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 9 ms 1116 KB Output is correct
5 Correct 16 ms 2040 KB Output is correct
6 Correct 16 ms 2036 KB Output is correct
7 Correct 13 ms 348 KB Output is correct
8 Correct 4 ms 972 KB Output is correct
9 Correct 10 ms 2648 KB Output is correct
10 Correct 19 ms 5848 KB Output is correct
11 Correct 19 ms 6096 KB Output is correct
12 Correct 1 ms 348 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 13 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 11 ms 472 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 3 ms 348 KB Output is correct
13 Correct 11 ms 348 KB Output is correct
14 Correct 11 ms 348 KB Output is correct
15 Correct 11 ms 520 KB Output is correct
16 Correct 1 ms 368 KB Output is correct

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 11 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 12 ms 524 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 460 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 664 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 7 ms 2272 KB Output is correct
12 Correct 13 ms 3808 KB Output is correct
13 Correct 14 ms 4328 KB Output is correct
14 Correct 13 ms 3808 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 9 ms 2140 KB Output is correct
18 Correct 24 ms 3804 KB Output is correct
19 Correct 17 ms 3920 KB Output is correct
20 Correct 11 ms 348 KB Output is correct
21 Correct 3 ms 1116 KB Output is correct
22 Correct 9 ms 2784 KB Output is correct
23 Correct 19 ms 5984 KB Output is correct
24 Correct 25 ms 6092 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 3 ms 412 KB Output is correct
27 Correct 11 ms 348 KB Output is correct
28 Correct 11 ms 520 KB Output is correct
29 Correct 12 ms 348 KB Output is correct
30 Incorrect 3 ms 1192 KB Output isn't correct
31 Halted 0 ms 0 KB -