oj.uz

Submission #1087900

# Submission time Handle Problem Language Result Execution time Memory
1087900 2024-09-13T11:27:58 Z vuavisao Mountains (NOI20_mountains) C++14
100 / 100
 129 ms 12504 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3", "unroll-loops")
using namespace std;

using ll = long long;

const int N = 300'000 + 10;

struct FenWick {
	int n_node = 0;
	vector<int> tree = {};

	void resize(int n) { n_node = n; tree.resize(n + 10, 0); }
	FenWick() {};
	FenWick(int n) { this -> resize(n); };

	void Update(int idx, int val) {
		for( ; idx <= n_node; idx += (idx & - idx)) tree[idx] += val;
		return;
	}

	int Query(int idx) {
		int res = 0;
		for( ; idx > 0; idx -= (idx & - idx)) res += tree[idx];
		return res;
	}

	int Sum_to(int l, int r) {
		if(l > r) return 0;
		return Query(r) - Query(l - 1);
	}

	int kth(int val) {
		int res = 0, s = 0;
		for(int mask = 30; mask >= 0; -- mask) {
			int nxt = res | (1 << mask);
			if(nxt < n_node && s + tree[nxt] < val) {
				res = nxt;
				s += tree[nxt];
			}
		}
		++ res; return res;
	}

	void reset(int idx) {
		for ( ; idx <= n_node; idx += (idx & - idx)) tree[idx] = 0;
		return;
	}
};

int n;
ll a[N];

int L[N], R[N];

void compress() {
	vector<ll> Pos = {};
	for (int i = 1; i <= n; ++ i) {
		Pos.push_back(a[i]);
	}
	
	sort(Pos.begin(), Pos.end());
	Pos.resize(unique(Pos.begin(), Pos.end()) - Pos.begin());

	for (int i = 1; i <= n; ++ i) {
		a[i] = lower_bound(Pos.begin(), Pos.end(), a[i]) - Pos.begin() + 1;
	}
}

void calc(int cnt[]) {
	FenWick bit(n);
	for (int i = 1; i <= n; ++ i) {
		cnt[i] = bit.Query(a[i]);
		bit.Update(a[i] + 1, 1);
	}
}

int32_t main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(nullptr); std::cout.tie(nullptr);
	cin >> n;
	for (int i = 1; i <= n; ++ i) cin >> a[i];
	compress();
	calc(L);
	reverse(a + 1, a + 1 + n);
	calc(R);
	ll res = 0;
	for (int i = 1; i <= n; ++ i) res += 1ll * L[i] * R[n - i + 1];
	cout << res;
	return (0 ^ 0);
}

/// Code by vuavisao

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 62 ms 6864 KB Output is correct
3 Correct 70 ms 6996 KB Output is correct
4 Correct 61 ms 6868 KB Output is correct
5 Correct 61 ms 6860 KB Output is correct
6 Correct 71 ms 6868 KB Output is correct
7 Correct 64 ms 6856 KB Output is correct
8 Correct 61 ms 6944 KB Output is correct
9 Correct 70 ms 6856 KB Output is correct
10 Correct 64 ms 6852 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 6868 KB Output is correct
2 Correct 44 ms 6964 KB Output is correct
3 Correct 39 ms 6864 KB Output is correct
4 Correct 44 ms 6868 KB Output is correct
5 Correct 47 ms 7152 KB Output is correct
6 Correct 43 ms 6864 KB Output is correct
7 Correct 41 ms 6868 KB Output is correct
8 Correct 41 ms 6868 KB Output is correct
9 Correct 39 ms 6932 KB Output is correct
10 Correct 1 ms 344 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 6868 KB Output is correct
2 Correct 44 ms 6964 KB Output is correct
3 Correct 39 ms 6864 KB Output is correct
4 Correct 44 ms 6868 KB Output is correct
5 Correct 47 ms 7152 KB Output is correct
6 Correct 43 ms 6864 KB Output is correct
7 Correct 41 ms 6868 KB Output is correct
8 Correct 41 ms 6868 KB Output is correct
9 Correct 39 ms 6932 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 52 ms 6868 KB Output is correct
12 Correct 50 ms 6868 KB Output is correct
13 Correct 50 ms 6864 KB Output is correct
14 Correct 51 ms 6868 KB Output is correct
15 Correct 50 ms 7036 KB Output is correct
16 Correct 52 ms 6868 KB Output is correct
17 Correct 55 ms 6864 KB Output is correct
18 Correct 39 ms 6864 KB Output is correct
19 Correct 35 ms 6868 KB Output is correct
20 Correct 0 ms 344 KB Output is correct

Subtask #4
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 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 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #5
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 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 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 4 ms 860 KB Output is correct
12 Correct 3 ms 856 KB Output is correct
13 Correct 4 ms 860 KB Output is correct
14 Correct 3 ms 860 KB Output is correct
15 Correct 4 ms 860 KB Output is correct
16 Correct 4 ms 860 KB Output is correct
17 Correct 3 ms 860 KB Output is correct
18 Correct 3 ms 860 KB Output is correct
19 Correct 2 ms 780 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #6
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 6868 KB Output is correct
2 Correct 44 ms 6964 KB Output is correct
3 Correct 39 ms 6864 KB Output is correct
4 Correct 44 ms 6868 KB Output is correct
5 Correct 47 ms 7152 KB Output is correct
6 Correct 43 ms 6864 KB Output is correct
7 Correct 41 ms 6868 KB Output is correct
8 Correct 41 ms 6868 KB Output is correct
9 Correct 39 ms 6932 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 52 ms 6868 KB Output is correct
12 Correct 50 ms 6868 KB Output is correct
13 Correct 50 ms 6864 KB Output is correct
14 Correct 51 ms 6868 KB Output is correct
15 Correct 50 ms 7036 KB Output is correct
16 Correct 52 ms 6868 KB Output is correct
17 Correct 55 ms 6864 KB Output is correct
18 Correct 39 ms 6864 KB Output is correct
19 Correct 35 ms 6868 KB Output is correct
20 Correct 0 ms 344 KB Output is correct
21 Correct 106 ms 7004 KB Output is correct
22 Correct 97 ms 6868 KB Output is correct
23 Correct 94 ms 6864 KB Output is correct
24 Correct 95 ms 7060 KB Output is correct
25 Correct 94 ms 6868 KB Output is correct
26 Correct 93 ms 7056 KB Output is correct
27 Correct 97 ms 6888 KB Output is correct
28 Correct 45 ms 6864 KB Output is correct
29 Correct 43 ms 6868 KB Output is correct
30 Correct 0 ms 348 KB Output is correct

Subtask #7
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 62 ms 6864 KB Output is correct
3 Correct 70 ms 6996 KB Output is correct
4 Correct 61 ms 6868 KB Output is correct
5 Correct 61 ms 6860 KB Output is correct
6 Correct 71 ms 6868 KB Output is correct
7 Correct 64 ms 6856 KB Output is correct
8 Correct 61 ms 6944 KB Output is correct
9 Correct 70 ms 6856 KB Output is correct
10 Correct 64 ms 6852 KB Output is correct
11 Correct 45 ms 6868 KB Output is correct
12 Correct 44 ms 6964 KB Output is correct
13 Correct 39 ms 6864 KB Output is correct
14 Correct 44 ms 6868 KB Output is correct
15 Correct 47 ms 7152 KB Output is correct
16 Correct 43 ms 6864 KB Output is correct
17 Correct 41 ms 6868 KB Output is correct
18 Correct 41 ms 6868 KB Output is correct
19 Correct 39 ms 6932 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 52 ms 6868 KB Output is correct
22 Correct 50 ms 6868 KB Output is correct
23 Correct 50 ms 6864 KB Output is correct
24 Correct 51 ms 6868 KB Output is correct
25 Correct 50 ms 7036 KB Output is correct
26 Correct 52 ms 6868 KB Output is correct
27 Correct 55 ms 6864 KB Output is correct
28 Correct 39 ms 6864 KB Output is correct
29 Correct 35 ms 6868 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 4 ms 860 KB Output is correct
42 Correct 3 ms 856 KB Output is correct
43 Correct 4 ms 860 KB Output is correct
44 Correct 3 ms 860 KB Output is correct
45 Correct 4 ms 860 KB Output is correct
46 Correct 4 ms 860 KB Output is correct
47 Correct 3 ms 860 KB Output is correct
48 Correct 3 ms 860 KB Output is correct
49 Correct 2 ms 780 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 106 ms 7004 KB Output is correct
52 Correct 97 ms 6868 KB Output is correct
53 Correct 94 ms 6864 KB Output is correct
54 Correct 95 ms 7060 KB Output is correct
55 Correct 94 ms 6868 KB Output is correct
56 Correct 93 ms 7056 KB Output is correct
57 Correct 97 ms 6888 KB Output is correct
58 Correct 45 ms 6864 KB Output is correct
59 Correct 43 ms 6868 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 122 ms 12380 KB Output is correct
62 Correct 129 ms 12492 KB Output is correct
63 Correct 123 ms 12504 KB Output is correct
64 Correct 124 ms 12492 KB Output is correct
65 Correct 127 ms 12472 KB Output is correct
66 Correct 122 ms 12388 KB Output is correct
67 Correct 116 ms 12488 KB Output is correct
68 Correct 116 ms 12488 KB Output is correct
69 Correct 105 ms 8916 KB Output is correct
70 Correct 0 ms 344 KB Output is correct