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Submission #945602

# Submission time Handle Problem Language Result Execution time Memory
945602 2024-03-14T05:31:46 Z siewjh Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 20 ms 6352 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll mod = 1e9 + 7;
ll nc2(ll x){
	return x * (x - 1) / 2 % mod;
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	int nums; cin >> nums;
	vector<ll> wv(nums), hv(nums);
	for (int i = 0; i < nums; i++) cin >> hv[i];
	for (int i = 0; i < nums; i++) cin >> wv[i];
	vector<tuple<ll, ll, ll>> st;
	ll ans = 0, sum = 0;
	for (int i = 0; i < nums; i++){
		ans = (ans + nc2(hv[i] + 1) * nc2(wv[i] + 1) % mod) % mod;
		ll wk = 0;
		while (!st.empty() && get<0>(st.back()) >= hv[i]){
			ll h, w, val; tie(h, w, val) = st.back();
			wk = (wk + w) % mod; sum = (sum - val + mod) % mod;
			st.pop_back();
		}
		ans = (ans + wk * nc2(hv[i] + 1) % mod * wv[i] % mod) % mod;
		ans = (ans + sum * wv[i] % mod) % mod;
		wk = (wk + wv[i]) % mod;
		ll nval = wk * nc2(hv[i] + 1) % mod;
		sum = (sum + nval) % mod;
		st.push_back({hv[i], wk, nval});
	}
	cout << ans;
}

Subtask #1
0.0 / 0.0

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

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 0 ms 348 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 0 ms 348 KB Output is correct
3 Correct 8 ms 1116 KB Output is correct
4 Correct 14 ms 1884 KB Output is correct
5 Correct 15 ms 1880 KB Output is correct
6 Correct 14 ms 1880 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 2 ms 604 KB Output is correct
3 Correct 10 ms 1112 KB Output is correct
4 Correct 17 ms 1884 KB Output is correct
5 Correct 18 ms 2040 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 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 2 ms 600 KB Output is correct
4 Correct 9 ms 1252 KB Output is correct
5 Correct 18 ms 2040 KB Output is correct
6 Correct 17 ms 1880 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 2 ms 1052 KB Output is correct
9 Correct 9 ms 2136 KB Output is correct
10 Correct 18 ms 5072 KB Output is correct
11 Correct 19 ms 6352 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 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 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 388 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct

Subtask #7
27.0 / 27.0

# 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 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 8 ms 1116 KB Output is correct
12 Correct 14 ms 1884 KB Output is correct
13 Correct 14 ms 1884 KB Output is correct
14 Correct 14 ms 1884 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 2 ms 600 KB Output is correct
17 Correct 9 ms 1116 KB Output is correct
18 Correct 18 ms 2040 KB Output is correct
19 Correct 17 ms 1884 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 2 ms 1048 KB Output is correct
22 Correct 9 ms 2136 KB Output is correct
23 Correct 18 ms 5072 KB Output is correct
24 Correct 18 ms 5840 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 2 ms 604 KB Output is correct
31 Correct 2 ms 604 KB Output is correct
32 Correct 9 ms 1116 KB Output is correct
33 Correct 9 ms 1116 KB Output is correct
34 Correct 20 ms 1884 KB Output is correct
35 Correct 17 ms 2136 KB Output is correct
36 Correct 18 ms 1884 KB Output is correct
37 Correct 18 ms 2036 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 18 ms 2044 KB Output is correct
40 Correct 18 ms 1884 KB Output is correct
41 Correct 18 ms 2392 KB Output is correct
42 Correct 19 ms 3540 KB Output is correct