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Submission #944852

# Submission time Handle Problem Language Result Execution time Memory
944852 2024-03-13T06:44:39 Z oolimry Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 31 ms 6852 KB 
#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define sz(x) (int) (x).size()
#define h first
#define w second
using namespace std;
typedef long long lint;
typedef pair<lint,lint> ii;

lint H[100005];
lint W[100005];
lint mod = 1000000007;

void fix(lint &x){
	x %= mod;
	if(x < 0) x += mod;
}

lint within(lint h, lint w){
	lint A = h * (h+1) / 2;
	fix(A);
	
	lint B = w * (w + 1) / 2;
	fix(B);
	
	return (A*B)%mod;
}

lint acc = 0; ///sum of h*(h+1)*w of previous blocks
lint ans = 0; 

vector<ii> S;

lint cal(lint h, lint w){
	lint toadd = h*(h+1)/2;
	fix(toadd);
	toadd *= w;
	fix(toadd);
	return toadd;
}

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	
	int n; cin >> n;
	
	for(int i = 0;i < n;i++) cin >> H[i];
	for(int i = 0;i < n;i++) cin >> W[i];	
	
	for(int i = 0;i < n;i++){
		lint h = H[i], w = W[i];
		
		lint popWidth = 0;
		while(!S.empty()){
			ii T = S.back();
			if(T.h > h){
				popWidth += T.w;
				S.pop_back();
				acc -= cal(T.h, T.w);
				fix(acc);
			}
			else break;
		}
		
		fix(popWidth);
		
		acc += cal(h, popWidth);
		fix(acc);
		
		ans += acc * w;
		ans += within(h,w);
		fix(ans);
		
		popWidth += w;
		fix(popWidth);
		
		S.push_back(ii(h, popWidth));
		acc += cal(h,w);
		fix(acc);
		
	}
	
	cout << ans << "\n";
	
}

Subtask #1
0.0 / 0.0

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

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory 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 1 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 10 ms 2344 KB Output is correct
4 Correct 19 ms 5204 KB Output is correct
5 Correct 20 ms 4312 KB Output is correct
6 Correct 19 ms 3412 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 3 ms 1116 KB Output is correct
3 Correct 13 ms 3272 KB Output is correct
4 Correct 27 ms 6104 KB Output is correct
5 Correct 23 ms 6100 KB Output is correct
6 Correct 1 ms 348 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 3 ms 1116 KB Output is correct
4 Correct 12 ms 3316 KB Output is correct
5 Correct 24 ms 6100 KB Output is correct
6 Correct 29 ms 6360 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 3 ms 1116 KB Output is correct
9 Correct 12 ms 3292 KB Output is correct
10 Correct 22 ms 5972 KB Output is correct
11 Correct 23 ms 6104 KB Output is correct
12 Correct 0 ms 344 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 1 ms 348 KB Output is correct
3 Correct 0 ms 460 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 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 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct

Subtask #7
27.0 / 27.0

# 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 0 ms 344 KB Output is correct
4 Correct 1 ms 476 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 0 ms 464 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 10 ms 2472 KB Output is correct
12 Correct 22 ms 5388 KB Output is correct
13 Correct 19 ms 4316 KB Output is correct
14 Correct 19 ms 3420 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 1048 KB Output is correct
17 Correct 12 ms 3340 KB Output is correct
18 Correct 23 ms 6088 KB Output is correct
19 Correct 25 ms 6852 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 3 ms 1116 KB Output is correct
22 Correct 12 ms 3292 KB Output is correct
23 Correct 27 ms 5848 KB Output is correct
24 Correct 23 ms 6092 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 1 ms 600 KB Output is correct
30 Correct 3 ms 692 KB Output is correct
31 Correct 3 ms 604 KB Output is correct
32 Correct 12 ms 2140 KB Output is correct
33 Correct 13 ms 2140 KB Output is correct
34 Correct 24 ms 3576 KB Output is correct
35 Correct 24 ms 3676 KB Output is correct
36 Correct 26 ms 3916 KB Output is correct
37 Correct 25 ms 3948 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 25 ms 3924 KB Output is correct
40 Correct 31 ms 4300 KB Output is correct
41 Correct 25 ms 4304 KB Output is correct
42 Correct 26 ms 5076 KB Output is correct