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Submission #458030

# Submission time Handle Problem Language Result Execution time Memory
458030 2021-08-07T19:23:30 Z fuad27 Fancy Fence (CEOI20_fancyfence) C++14
100 / 100
 106 ms 6084 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define mod (long long)1000000007
ll sum(ll n) {
	return (n*(n+1))/2;
}
ll multiply(ll a, ll b) {
	a%=mod;
	b%=mod;
	return (a*b)%mod;
}
int main () {
	ll n, ans = 0;
	cin >> n;
	ll h[n+1] = {0}, w[n+1] = {0}, pref[n+1] = {0}, dp[n+1] = {0};
	for(int i = 1;i<=n;i++) {
			cin >> h[i];
	}
	for(int i = 1;i<=n;i++) {
		cin >> w[i];
	}
	for(int i = 1;i<=n;i++) {
		pref[i] = pref[i-1]+w[i];	
	}
	stack<ll> s;
	s.push(0);
	for(int i = 1;i<=n;i++) {
		while(!s.empty() and h[s.top()] >= h[i])s.pop();
		dp[i] = dp[s.top()]+multiply(sum(h[i]), (pref[i] - pref[s.top()]));
		ans += multiply(dp[s.top()], w[i]) + multiply(sum(h[i]), multiply(pref[i-1] - pref[s.top()], w[i]))+multiply(sum(h[i]), sum(w[i]));
		dp[i]%=mod;
		ans%=mod;s.push(i);
	}
	cout<<ans;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 43 ms 2372 KB Output is correct
4 Correct 65 ms 4536 KB Output is correct
5 Correct 65 ms 4528 KB Output is correct
6 Correct 65 ms 4548 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 10 ms 688 KB Output is correct
3 Correct 46 ms 2712 KB Output is correct
4 Correct 92 ms 5304 KB Output is correct
5 Correct 96 ms 5428 KB Output is correct
6 Correct 1 ms 204 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 10 ms 716 KB Output is correct
4 Correct 47 ms 2724 KB Output is correct
5 Correct 91 ms 5304 KB Output is correct
6 Correct 95 ms 5440 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 9 ms 792 KB Output is correct
9 Correct 50 ms 2964 KB Output is correct
10 Correct 88 ms 5960 KB Output is correct
11 Correct 104 ms 6072 KB Output is correct
12 Correct 0 ms 204 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 292 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 288 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 204 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 292 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 33 ms 2348 KB Output is correct
12 Correct 79 ms 4564 KB Output is correct
13 Correct 66 ms 4540 KB Output is correct
14 Correct 65 ms 4532 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 10 ms 788 KB Output is correct
17 Correct 46 ms 2712 KB Output is correct
18 Correct 91 ms 5304 KB Output is correct
19 Correct 98 ms 5432 KB Output is correct
20 Correct 2 ms 332 KB Output is correct
21 Correct 10 ms 844 KB Output is correct
22 Correct 48 ms 2964 KB Output is correct
23 Correct 88 ms 5948 KB Output is correct
24 Correct 90 ms 6084 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 304 KB Output is correct
28 Correct 2 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 10 ms 796 KB Output is correct
31 Correct 10 ms 716 KB Output is correct
32 Correct 45 ms 2600 KB Output is correct
33 Correct 46 ms 2728 KB Output is correct
34 Correct 86 ms 5060 KB Output is correct
35 Correct 85 ms 5064 KB Output is correct
36 Correct 93 ms 5304 KB Output is correct
37 Correct 93 ms 5348 KB Output is correct
38 Correct 0 ms 204 KB Output is correct
39 Correct 106 ms 5316 KB Output is correct
40 Correct 91 ms 5312 KB Output is correct
41 Correct 96 ms 5348 KB Output is correct
42 Correct 91 ms 5692 KB Output is correct