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Submission #628809

# Submission time Handle Problem Language Result Execution time Memory
628809 2022-08-13T17:29:09 Z vovamr Izbori (COCI22_izbori) C++17
40 / 110
 3000 ms 19960 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fi first
#define se second
#define ll long long
#define ld long double
#define sz(x) ((int)(x).size())
#define all(x) 	(x).begin(), (x).end()
#define pb push_back
#define mpp make_pair
#define ve vector
using namespace std;
using namespace __gnu_pbds;
template<class T> using oset = tree<T,null_type,less_equal<T>,rb_tree_tag,tree_order_statistics_node_update>;
const ll inf = 1e18; const int iinf = 1e9;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
template <typename T> inline bool chmin(T& a, T b) { return (a > b ? a = b, 1 : 0); }
template <typename T> inline bool chmax(T& a, T b) { return (a < b ? a = b, 1 : 0); }

const int N = 2e5 + 10;
int a[N]; ll ans = 0;
ve<int> occ[N];

inline static ll F(const int &l, const int &r) { return (l + r) * 1ll * (r - l + 1) / 2ll; }
inline void cnt(const int &l1, const int &r1, 
		const int &l2, const int &r2,
		const int &C) {
	int R = min(r2, r1 + C - 1);
	int L = max(l2, l1 + C);

	ans += max(0, R - l2 + 1) * 1ll * (r1 + 1);
	ans -= l1 * 1ll * max(0, min(R, l1 + C - 1) - l2 + 1);
	ans += max(0, R + 1 - max(l2, l1 + C) - 1 + 1) * 1ll * C;
	if (L <= R) ans -= F(L + 1, R + 1);
}

inline void solve() {
	int n;
	cin >> n;
	ve<int> al;
	for (int i = 0; i < n; ++i) cin >> a[i], al.pb(a[i]);
	sort(all(al)), al.erase(unique(all(al)), al.end());
	for (int i = 0; i < n; ++i) a[i] = lower_bound(all(al), a[i]) - al.begin();
	for (int i = 0; i < n; ++i) occ[a[i]].pb(i);

	const int b = 1800;

	ve<int> p(n);
	for (int el = 0; el < sz(al); ++el) {
		if (sz(occ[el]) > b) {
			oset<int> st; st.insert(0);
			for (int i = 0; i < n; ++i) {
				p[i] = (a[i] == el ? 1 : -1);
				if (i) p[i] += p[i - 1];

				ans += st.order_of_key(p[i]);
				st.insert(p[i]);
			}
		}
		else {
			for (int l = 0; l < sz(occ[el]); ++l) {
				for (int r = l; r < sz(occ[el]); ++r) {
					int r1 = occ[el][l] - 1, l1 = (!l ? -1 : occ[el][l - 1]);
					int l2 = occ[el][r], r2 = (r + 1 == sz(occ[el]) ? n - 1 : occ[el][r + 1] - 1);
					cnt(l1, r1, l2, r2, 2 * (r - l + 1));
				}
			}
		}
	}

	cout << ans;
}

signed main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	int q = 1; // cin >> q;
	while (q--) solve();
	cerr << fixed << setprecision(3) << "Time execution: " << (double)clock() / CLOCKS_PER_SEC << endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 5028 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 5028 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 3 ms 5032 KB Output is correct
9 Correct 4 ms 5076 KB Output is correct
10 Correct 4 ms 5076 KB Output is correct
11 Correct 4 ms 5076 KB Output is correct
12 Correct 4 ms 5076 KB Output is correct
13 Correct 4 ms 5044 KB Output is correct
14 Correct 4 ms 5060 KB Output is correct
15 Correct 4 ms 5076 KB Output is correct
16 Correct 4 ms 5076 KB Output is correct
17 Correct 3 ms 5172 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 13920 KB Output is correct
2 Correct 134 ms 16264 KB Output is correct
3 Correct 74 ms 11528 KB Output is correct
4 Correct 142 ms 16872 KB Output is correct
5 Correct 151 ms 17352 KB Output is correct
6 Correct 156 ms 18072 KB Output is correct
7 Correct 156 ms 17988 KB Output is correct
8 Correct 155 ms 17856 KB Output is correct
9 Correct 159 ms 18068 KB Output is correct
10 Correct 157 ms 18004 KB Output is correct
11 Correct 145 ms 17940 KB Output is correct

Subtask #4
0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 5028 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 3 ms 5032 KB Output is correct
9 Correct 4 ms 5076 KB Output is correct
10 Correct 4 ms 5076 KB Output is correct
11 Correct 4 ms 5076 KB Output is correct
12 Correct 4 ms 5076 KB Output is correct
13 Correct 4 ms 5044 KB Output is correct
14 Correct 4 ms 5060 KB Output is correct
15 Correct 4 ms 5076 KB Output is correct
16 Correct 4 ms 5076 KB Output is correct
17 Correct 3 ms 5172 KB Output is correct
18 Correct 102 ms 13920 KB Output is correct
19 Correct 134 ms 16264 KB Output is correct
20 Correct 74 ms 11528 KB Output is correct
21 Correct 142 ms 16872 KB Output is correct
22 Correct 151 ms 17352 KB Output is correct
23 Correct 156 ms 18072 KB Output is correct
24 Correct 156 ms 17988 KB Output is correct
25 Correct 155 ms 17856 KB Output is correct
26 Correct 159 ms 18068 KB Output is correct
27 Correct 157 ms 18004 KB Output is correct
28 Correct 145 ms 17940 KB Output is correct
29 Correct 153 ms 19452 KB Output is correct
30 Correct 16 ms 6868 KB Output is correct
31 Correct 29 ms 8364 KB Output is correct
32 Correct 72 ms 12172 KB Output is correct
33 Correct 31 ms 8596 KB Output is correct
34 Correct 32 ms 8684 KB Output is correct
35 Correct 21 ms 7512 KB Output is correct
36 Correct 13 ms 6536 KB Output is correct
37 Correct 16 ms 6836 KB Output is correct
38 Correct 304 ms 18188 KB Output is correct
39 Correct 312 ms 18164 KB Output is correct
40 Correct 302 ms 18196 KB Output is correct
41 Correct 309 ms 18168 KB Output is correct
42 Correct 299 ms 18120 KB Output is correct
43 Correct 629 ms 19960 KB Output is correct
44 Correct 676 ms 19840 KB Output is correct
45 Correct 623 ms 19780 KB Output is correct
46 Correct 642 ms 19848 KB Output is correct
47 Correct 632 ms 19860 KB Output is correct
48 Correct 437 ms 9104 KB Output is correct
49 Correct 434 ms 9028 KB Output is correct
50 Execution timed out 3068 ms 18504 KB Time limit exceeded
51 Halted 0 ms 0 KB -