oj.uz

Submission #772036

# Submission time Handle Problem Language Result Execution time Memory
772036 2023-07-03T14:32:24 Z RushB Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 20 ms 7196 KB 
#include "bits/stdc++.h"
#define int long long
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
using namespace std;
const long long INF = 1ll << 60;
const int N = 1e5 + 5;
const int M = 1e9 + 7;
int pw(int a) {
	a %= M;
	return a * (a - 1) / 2 % M;
}
int H[N], W[N], n, ps[N], lt[N], rt[N];

signed main() {
	ios::sync_with_stdio(0), cin.tie(0);
	cin >> n;
	FOR(i, 1, n + 1) cin >> H[i];
	FOR(i, 1, n + 1) cin >> W[i];
	vector<int> st{0};
	H[0] = H[n + 1] = -INF;
	FOR(i, 1, n + 1) {
		while (H[i] < H[st.back()]) st.pop_back();
		lt[i] = st.back();
		st.push_back(i);
	}
	st = {n + 1};
	for (int i = n; i >= 1; i--) {
		while (H[i] <= H[st.back()]) st.pop_back();
		rt[i] = st.back();
		st.push_back(i);
	}
	FOR(i, 1, n + 1) ps[i] = ps[i - 1] + W[i];
	int ans = 0;
	FOR(i, 1, n + 1) {
		int L = ps[i - 1] - ps[lt[i]] + 1;
		int R = ps[rt[i] - 1] - ps[i] + 1;
		int re = pw(L + R + W[i] - 1) - pw(L) - pw(R);
		ans += re % M * pw(H[i] + 1) % M;
	}
	ans %= M;
	if (ans < 0) ans += M;
	cout << ans << '\n';
	return 0;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 8 ms 3172 KB Output is correct
4 Correct 16 ms 6124 KB Output is correct
5 Correct 17 ms 5836 KB Output is correct
6 Correct 15 ms 5588 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 1108 KB Output is correct
3 Correct 10 ms 3796 KB Output is correct
4 Correct 19 ms 7020 KB Output is correct
5 Correct 19 ms 7196 KB Output is correct
6 Correct 1 ms 340 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 2 ms 1100 KB Output is correct
4 Correct 10 ms 3800 KB Output is correct
5 Correct 19 ms 7004 KB Output is correct
6 Correct 19 ms 7164 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 2 ms 1108 KB Output is correct
9 Correct 10 ms 3796 KB Output is correct
10 Correct 18 ms 6856 KB Output is correct
11 Correct 19 ms 7044 KB Output is correct
12 Correct 0 ms 328 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 328 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 8 ms 3160 KB Output is correct
12 Correct 16 ms 6224 KB Output is correct
13 Correct 16 ms 5748 KB Output is correct
14 Correct 15 ms 5492 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 3 ms 1108 KB Output is correct
17 Correct 10 ms 3796 KB Output is correct
18 Correct 20 ms 6972 KB Output is correct
19 Correct 19 ms 7112 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 1108 KB Output is correct
22 Correct 10 ms 3800 KB Output is correct
23 Correct 18 ms 6980 KB Output is correct
24 Correct 19 ms 6972 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 332 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 2 ms 848 KB Output is correct
31 Correct 3 ms 852 KB Output is correct
32 Correct 10 ms 3196 KB Output is correct
33 Correct 10 ms 3256 KB Output is correct
34 Correct 19 ms 5912 KB Output is correct
35 Correct 20 ms 5968 KB Output is correct
36 Correct 20 ms 6100 KB Output is correct
37 Correct 20 ms 6092 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 18 ms 6096 KB Output is correct
40 Correct 18 ms 6136 KB Output is correct
41 Correct 18 ms 6364 KB Output is correct
42 Correct 18 ms 6672 KB Output is correct