oj.uz

답안 #675700

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
675700 2022-12-27T18:09:40 Z ghostwriter 3단 점프 (JOI19_jumps) C++17
19 / 100
 472 ms 76236 KB 
// #pragma GCC optimize ("Ofast")
// #pragma GCC target ("avx2")
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
    #include <debug.h>
#else
    #define debug(...)
#endif
#define ft front
#define bk back
#define st first
#define nd second
#define ins insert
#define ers erase
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define bg begin
#define ed end
#define all(x) (x).bg(), (x).ed()
#define sz(x) (int)(x).size()
// #define int long long
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
#define FOR(i, l, r) for (int i = (l); i <= (r); ++i)
#define FOS(i, r, l) for (int i = (r); i >= (l); --i)
#define FRN(i, n) for (int i = 0; i < (n); ++i)
#define FSN(i, n) for (int i = (n) - 1; i >= 0; --i)
#define EACH(i, x) for (auto &i : (x))
#define WHILE while
template<typename T> T gcd(T a, T b) { T d2 = (a | b) & -(a | b); a /= d2; b /= d2; WHILE(b) { a = a % b; swap(a, b); } return a * d2; }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
void _assert(bool statement) { if (statement) return; cerr << "\n>> Assertion failed!\n"; exit(0); }
void _assert(bool statement, const str &message) { if (statement) return; cerr << "\n>> Assertion failed: " << message << '\n'; exit(0); }
void _error(const str &message) { cerr << "\n>> Error: " << message << '\n'; exit(0); }
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
----------------------------------------------------------------
    END OF TEMPLATE
----------------------------------------------------------------
    Tran The Bao - ghostwriter
    Training for VOI23 gold medal
----------------------------------------------------------------
    GOAT
----------------------------------------------------------------
*/
const int N = 5e5 + 5;
int n, q, a[N];
pi query[N];
void input(int test_id) {
	cin >> n;
	FOR(i, 1, n) cin >> a[i];
	cin >> q;
	FOR(i, 1, q) cin >> query[i].st >> query[i].nd;
}
namespace subtask12 {
	const int N = 5005;
	int d[N][N], maxx[N], pos[N], rs = 0;
	int get(int l, int r) {
		if (!pos[l]) {
			maxx[l] = a[l];
			pos[l] = l;
		}
		WHILE(pos[l] < r) {
			++pos[l];
			maxx[l] = max(maxx[l], a[pos[l]]);
		}
		return maxx[l];
	}
	void solve() {
		FOR(len, 3, n)
		FOR(l, 1, n - len + 1) {
			int r = l + len - 1;
			d[l][r] = max({d[l + 1][r], d[l][r - 1], a[l] + a[r] + get(l + 1, l + (r - l) / 2)});
		}
		FOR(i, 1, q) {
			int l = query[i].st, r = query[i].nd;
			cout << d[l][r] << '\n';
		}
	}
}
namespace subtask3 {
	int maxx[N][18], LOG[N], rs = 0;
	multiset<pi> s;
	void build() {
		FOR(i, 1, n) {
			maxx[i][0] = a[i];
			LOG[i] = log2(i);
		}
		FOR(j, 1, 17)
		FOR(i, 1, n) {
			if (i + (1 << j) - 1 > n) break;
			maxx[i][j] = max(maxx[i][j - 1], maxx[i + (1 << (j - 1))][j - 1]);
		}
	}
	int get(int l, int r) {
		int l2 = LOG[r - l + 1];
		return max(maxx[l][l2], maxx[r - (1 << l2) + 1][l2]);
	}
	int cal(int i) {
		int rs = 0;
		FOR(j, 1, i - 2) {
			int mid = j + (i - j) / 2;
			rs = max(rs, a[j] + a[i] + get(j + 1, mid));
		}
		FOR(j, i + 2, n) {
			int mid = i + (j - i) / 2;
			rs = max(rs, a[i] + a[j] + get(i + 1, mid));
		}
		FOR(j, 1, i - 1)
			if (2 * i - j <= n)
				rs = max(rs, a[j] + a[i] + get(2 * i - j, n));
		return rs;
	}
	void solve() {
		assert(0 > 1);
		FOR(i, 1, n) {
			s.ins({a[i], i});
			if (sz(s) > 17) s.ers(s.bg());
		}
		EACH(j, s) {
			int i = j.nd;
			rs = max(rs, cal(i));
		}
		cout << rs;
	}
}
void solve(int test_id) {
	if (n <= 5000) {
		subtask12::solve();
		return;
	}
	if (n <= 2e5 && q == 1 && query[1].st == 1 && query[1].nd == n) {
		subtask3::solve();
		return;
	}
}
void reinit(int test_id) {
 
}
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);
    int test_num = 1;
    // cin >> test_num; // comment if the problem does not requires multitest
    FOR(i, 1, test_num) {
        input(i); // input in noninteractive problems for case #i
        solve(i); // main function to solve case #i
        reinit(i); // reinit global data to default used in case #i
    }
    #ifdef LOCAL
        cerr << "\nTime: " << setprecision(5) << fixed << (ldb)clock() / CLOCKS_PER_SEC << "ms.\n";
    #endif
    return 0;
}
/*
----------------------------------------------------------------
From Benq:
    stuff you should look for
        * int overflow, array bounds
        * special cases (n=1?)
        * do smth instead of nothing and stay organized
        * WRITE STUFF DOWN
        * DON'T GET STUCK ON ONE APPROACH
----------------------------------------------------------------
*/

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 724 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 724 KB Output is correct
11 Correct 299 ms 76236 KB Output is correct
12 Correct 307 ms 76140 KB Output is correct
13 Correct 296 ms 76108 KB Output is correct
14 Correct 341 ms 76180 KB Output is correct
15 Correct 287 ms 76216 KB Output is correct
16 Correct 472 ms 75576 KB Output is correct
17 Correct 287 ms 75508 KB Output is correct
18 Correct 319 ms 75612 KB Output is correct
19 Correct 282 ms 76144 KB Output is correct

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 20 ms 1996 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 724 KB Output is correct
11 Correct 299 ms 76236 KB Output is correct
12 Correct 307 ms 76140 KB Output is correct
13 Correct 296 ms 76108 KB Output is correct
14 Correct 341 ms 76180 KB Output is correct
15 Correct 287 ms 76216 KB Output is correct
16 Correct 472 ms 75576 KB Output is correct
17 Correct 287 ms 75508 KB Output is correct
18 Correct 319 ms 75612 KB Output is correct
19 Correct 282 ms 76144 KB Output is correct
20 Runtime error 20 ms 1996 KB Execution killed with signal 6
21 Halted 0 ms 0 KB -