oj.uz

Submission #796438

# Submission time Handle Problem Language Result Execution time Memory
796438 2023-07-28T11:40:41 Z jmyszka2007 Hacker (BOI15_hac) C++17
100 / 100
 160 ms 9860 KB 
#include <bits/stdc++.h>
using namespace std;
template<class A, class B>
ostream& operator<<(ostream& o, const pair<A, B>& p) {return o << '(' << p.first << ", " << p.second << ')';}
template<size_t Index = 0, typename... Types>
ostream& printTupleElements(ostream& o, const tuple<Types...>& t) {if constexpr (Index < sizeof...(Types)){if(Index > 0){o << ", ";}o << get<Index>(t);printTupleElements<Index + 1>(o, t);}return o;}
template<typename... Types>
ostream& operator<<(ostream& o, const tuple<Types...>& t){o << "(";printTupleElements(o, t);return o << ")";}
template<class T>
auto operator<<(ostream& o, const T& x) -> decltype(x.end(), o){o << '{';bool first = true;for (const auto& e : x){if (!first){o << ", ";}o << e;first = false;} return o << '}';}
#define DEBUG
#ifdef DEBUG
#define fastio()
#define debug(x...) cerr << "[" #x "]: ", [](auto... $) {((cerr << $ << "; "), ...); }(x), cerr << '\n'
#define check(x) if (!(x)) { cerr << "Check failed: " << #x << " in line " << __LINE__ << endl; exit(1); }
#else
#define fastio() ios_base::sync_with_stdio(0); cin.tie(0);
#define debug(...)
#define check(x) 
#endif
typedef long long ll;
#define pi pair<int, int>
#define pl pair<ll, ll>
#define st first
#define nd second
#define vi vector<int>
#define vll vector<ll>
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size
constexpr int base = (1 << 19);
int tri[2 * base];
void set_tree() {
	for(int i = 0; i < 2 * base; i++) {
		tri[i] = 1e9;
	}
}
void upd(int l, int r, int x) {
	l += base;
	r += base;
	while(l <= r) {
		if(l & 1) {
			tri[l] = min(tri[l], x);
		}
		if(!(r & 1)) {
			tri[r] = min(tri[r], x);
		}
		l = (l + 1) / 2;
		r = (r - 1) / 2;
	}
}
int que(int v) {
	v += base;
	int ans = 1e9;
	while(v > 0) {
		ans = min(ans, tri[v]);
		v /= 2;
	}
	return ans;
}
void solve() {
	int n;
	cin >> n;
	vi tab(n);
	for(auto &x : tab) {
		cin >> x;
	}
	vi s = tab;
	for(int i = 1; i < n; i++) {
		s[i] += s[i - 1];
	}
	auto get_sum = [&](int l, int r) {
		if(l > r) {
			return s[n - 1] - (s[l - 1] - s[r]);
		}
		if(!l) {
			return s[r];
		}
		return s[r] - s[l - 1];
	};
	set_tree();
	for(int i = 0; i < n; i++) {
		int r = (i + (n + 1) / 2 - 1) % n;
		int sum = get_sum(i, r);
		if(r >= i) {
			upd(i, r, sum);
		}
		else {
			upd(i, n - 1, sum);
			upd(0, r, sum);
		}
	}
	int ans = 0;
	for(int i = 0; i < n; i++) {
		ans = max(ans, que(i));
	}
	cout << ans << '\n';
}
int main() {
	fastio();
	int t;
	//cin >> t;
	t = 1;	
	while(t--) {
		solve();
	}
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4308 KB Output is correct
2 Correct 3 ms 4424 KB Output is correct
3 Correct 2 ms 4404 KB Output is correct
4 Correct 2 ms 4376 KB Output is correct
5 Correct 2 ms 4308 KB Output is correct
6 Correct 2 ms 4308 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 2 ms 4308 KB Output is correct
9 Correct 2 ms 4308 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 2 ms 4404 KB Output is correct
12 Correct 2 ms 4308 KB Output is correct
13 Correct 3 ms 4308 KB Output is correct
14 Correct 2 ms 4308 KB Output is correct
15 Correct 2 ms 4288 KB Output is correct
16 Correct 2 ms 4408 KB Output is correct
17 Correct 2 ms 4308 KB Output is correct
18 Correct 2 ms 4308 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4308 KB Output is correct
2 Correct 3 ms 4424 KB Output is correct
3 Correct 2 ms 4404 KB Output is correct
4 Correct 2 ms 4376 KB Output is correct
5 Correct 2 ms 4308 KB Output is correct
6 Correct 2 ms 4308 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 2 ms 4308 KB Output is correct
9 Correct 2 ms 4308 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 2 ms 4404 KB Output is correct
12 Correct 2 ms 4308 KB Output is correct
13 Correct 3 ms 4308 KB Output is correct
14 Correct 2 ms 4308 KB Output is correct
15 Correct 2 ms 4288 KB Output is correct
16 Correct 2 ms 4408 KB Output is correct
17 Correct 2 ms 4308 KB Output is correct
18 Correct 2 ms 4308 KB Output is correct
19 Correct 2 ms 4308 KB Output is correct
20 Correct 2 ms 4408 KB Output is correct
21 Correct 2 ms 4404 KB Output is correct
22 Correct 3 ms 4436 KB Output is correct
23 Correct 4 ms 4436 KB Output is correct
24 Correct 3 ms 4436 KB Output is correct
25 Correct 4 ms 4448 KB Output is correct
26 Correct 3 ms 4436 KB Output is correct
27 Correct 2 ms 4308 KB Output is correct
28 Correct 2 ms 4308 KB Output is correct
29 Correct 2 ms 4308 KB Output is correct
30 Correct 3 ms 4416 KB Output is correct
31 Correct 3 ms 4436 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4308 KB Output is correct
2 Correct 2 ms 4308 KB Output is correct
3 Correct 3 ms 4436 KB Output is correct
4 Correct 26 ms 5368 KB Output is correct
5 Correct 57 ms 6720 KB Output is correct
6 Correct 74 ms 7420 KB Output is correct
7 Correct 91 ms 8116 KB Output is correct
8 Correct 150 ms 9804 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4308 KB Output is correct
2 Correct 3 ms 4424 KB Output is correct
3 Correct 2 ms 4404 KB Output is correct
4 Correct 2 ms 4376 KB Output is correct
5 Correct 2 ms 4308 KB Output is correct
6 Correct 2 ms 4308 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 2 ms 4308 KB Output is correct
9 Correct 2 ms 4308 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 2 ms 4404 KB Output is correct
12 Correct 2 ms 4308 KB Output is correct
13 Correct 3 ms 4308 KB Output is correct
14 Correct 2 ms 4308 KB Output is correct
15 Correct 2 ms 4288 KB Output is correct
16 Correct 2 ms 4408 KB Output is correct
17 Correct 2 ms 4308 KB Output is correct
18 Correct 2 ms 4308 KB Output is correct
19 Correct 2 ms 4308 KB Output is correct
20 Correct 2 ms 4408 KB Output is correct
21 Correct 2 ms 4404 KB Output is correct
22 Correct 3 ms 4436 KB Output is correct
23 Correct 4 ms 4436 KB Output is correct
24 Correct 3 ms 4436 KB Output is correct
25 Correct 4 ms 4448 KB Output is correct
26 Correct 3 ms 4436 KB Output is correct
27 Correct 2 ms 4308 KB Output is correct
28 Correct 2 ms 4308 KB Output is correct
29 Correct 2 ms 4308 KB Output is correct
30 Correct 3 ms 4416 KB Output is correct
31 Correct 3 ms 4436 KB Output is correct
32 Correct 2 ms 4308 KB Output is correct
33 Correct 2 ms 4308 KB Output is correct
34 Correct 3 ms 4436 KB Output is correct
35 Correct 26 ms 5368 KB Output is correct
36 Correct 57 ms 6720 KB Output is correct
37 Correct 74 ms 7420 KB Output is correct
38 Correct 91 ms 8116 KB Output is correct
39 Correct 150 ms 9804 KB Output is correct
40 Correct 5 ms 4436 KB Output is correct
41 Correct 7 ms 4544 KB Output is correct
42 Correct 11 ms 4692 KB Output is correct
43 Correct 65 ms 6832 KB Output is correct
44 Correct 146 ms 9848 KB Output is correct
45 Correct 29 ms 5388 KB Output is correct
46 Correct 89 ms 7984 KB Output is correct
47 Correct 147 ms 9860 KB Output is correct
48 Correct 160 ms 9824 KB Output is correct
49 Correct 133 ms 9804 KB Output is correct
50 Correct 135 ms 9852 KB Output is correct