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Submission #945917

# Submission time Handle Problem Language Result Execution time Memory
945917 2024-03-14T08:45:27 Z teacup Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 67 ms 7904 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ii pair<int,int>
typedef vector<int> vi;
#define iii tuple<int,int,int>
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef map<int,int> mii;

#ifndef debug
	#define cerr if (0) cerr
#endif
int N,H[100005],W[100005];
int pref[100005], last_mins[100005];
const int mod=1e9+7;
int nc2(int n){
	return ((n*(n-1))/2)%mod;
}
int rect(int h, int w){
	return (nc2(h+1)*nc2(w+1))%mod;
}
int32_t main(){
	cin>>N;
	int last_min = -1;
	for (int i=0; i<N; i++)cin>>H[i];
	for (int i=0; i<N; i++){
		cin>>W[i];
		if (i==0) pref[i]=W[i];
		else pref[i]=W[i]+pref[i-1];
		
		last_mins[i]=last_min;
		if (i>0 && H[i-1]>H[i]){
			last_min = i;
		}
	}
	
	int ans=0, sum=0;
	stack<iii> st;
	for (int i=0; i<N; i++){
		ans += rect(H[i],W[i]);
		ans %= mod;
		
		int total_w = 0;
		while (st.size() && get<0>(st.top()) >= H[i]){
			auto [h,w,p] = st.top();
			st.pop();
			total_w += w;
			total_w %= mod;
			sum = (sum-p + mod);
			sum %= mod;
		}
		ans += (sum*W[i])%mod;
		ans %= mod;
		ans += ((total_w * nc2(H[i]+1))%mod * W[i])%mod;
		ans %= mod;
		total_w += W[i];
		total_w %= mod;
		int t = total_w * nc2(H[i]+1);
		t %= mod;
		sum += t;
		sum %= mod;
		st.push({H[i], total_w, t});
	}
	cout<<ans;
}

Subtask #1
0.0 / 0.0

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

Subtask #3
13.0 / 13.0

# 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 21 ms 3444 KB Output is correct
4 Correct 45 ms 4504 KB Output is correct
5 Correct 41 ms 4704 KB Output is correct
6 Correct 42 ms 4692 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2396 KB Output is correct
2 Correct 8 ms 2652 KB Output is correct
3 Correct 30 ms 3668 KB Output is correct
4 Correct 57 ms 5460 KB Output is correct
5 Correct 60 ms 5468 KB Output is correct
6 Correct 0 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 2396 KB Output is correct
3 Correct 6 ms 2648 KB Output is correct
4 Correct 33 ms 3676 KB Output is correct
5 Correct 58 ms 5332 KB Output is correct
6 Correct 60 ms 5552 KB Output is correct
7 Correct 2 ms 2592 KB Output is correct
8 Correct 6 ms 2904 KB Output is correct
9 Correct 30 ms 4312 KB Output is correct
10 Correct 57 ms 7904 KB Output is correct
11 Correct 60 ms 7708 KB Output is correct
12 Correct 1 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 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2648 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2392 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 0 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 1 ms 2396 KB Output is correct
5 Correct 1 ms 2468 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2392 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 27 ms 3420 KB Output is correct
12 Correct 42 ms 4672 KB Output is correct
13 Correct 42 ms 4692 KB Output is correct
14 Correct 41 ms 4688 KB Output is correct
15 Correct 2 ms 2392 KB Output is correct
16 Correct 6 ms 2652 KB Output is correct
17 Correct 29 ms 3936 KB Output is correct
18 Correct 58 ms 5452 KB Output is correct
19 Correct 59 ms 5584 KB Output is correct
20 Correct 1 ms 2392 KB Output is correct
21 Correct 7 ms 2904 KB Output is correct
22 Correct 29 ms 4404 KB Output is correct
23 Correct 56 ms 7760 KB Output is correct
24 Correct 67 ms 7680 KB Output is correct
25 Correct 1 ms 2396 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 6 ms 2652 KB Output is correct
31 Correct 6 ms 2652 KB Output is correct
32 Correct 29 ms 3940 KB Output is correct
33 Correct 29 ms 3928 KB Output is correct
34 Correct 58 ms 5200 KB Output is correct
35 Correct 54 ms 5296 KB Output is correct
36 Correct 57 ms 5456 KB Output is correct
37 Correct 60 ms 5328 KB Output is correct
38 Correct 1 ms 2392 KB Output is correct
39 Correct 58 ms 5464 KB Output is correct
40 Correct 58 ms 5744 KB Output is correct
41 Correct 58 ms 5712 KB Output is correct
42 Correct 58 ms 6484 KB Output is correct