oj.uz

답안 #675701

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
675701 2022-12-27T18:12:15 Z ghostwriter 3단 점프 (JOI19_jumps) C++17
46 / 100
 342 ms 76336 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() {
		FOR(i, 1, n) {
			s.ins({a[i], i});
			if (sz(s) > 18) s.ers(s.bg());
		}
		build();
		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;
}
/*
5
5 2 1 5 3
1
1 5
----------------------------------------------------------------
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 297 ms 76336 KB Output is correct
12 Correct 279 ms 76084 KB Output is correct
13 Correct 288 ms 76204 KB Output is correct
14 Correct 274 ms 76208 KB Output is correct
15 Correct 309 ms 76244 KB Output is correct
16 Correct 293 ms 75540 KB Output is correct
17 Correct 302 ms 75468 KB Output is correct
18 Correct 342 ms 75656 KB Output is correct
19 Correct 278 ms 76144 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 73 ms 15984 KB Output is correct
2 Correct 84 ms 17724 KB Output is correct
3 Correct 61 ms 17644 KB Output is correct
4 Correct 74 ms 17708 KB Output is correct
5 Correct 73 ms 17612 KB Output is correct
6 Correct 72 ms 17076 KB Output is correct
7 Correct 71 ms 16880 KB Output is correct
8 Correct 75 ms 16848 KB Output is correct
9 Correct 71 ms 17272 KB Output is correct

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 297 ms 76336 KB Output is correct
12 Correct 279 ms 76084 KB Output is correct
13 Correct 288 ms 76204 KB Output is correct
14 Correct 274 ms 76208 KB Output is correct
15 Correct 309 ms 76244 KB Output is correct
16 Correct 293 ms 75540 KB Output is correct
17 Correct 302 ms 75468 KB Output is correct
18 Correct 342 ms 75656 KB Output is correct
19 Correct 278 ms 76144 KB Output is correct
20 Correct 73 ms 15984 KB Output is correct
21 Correct 84 ms 17724 KB Output is correct
22 Correct 61 ms 17644 KB Output is correct
23 Correct 74 ms 17708 KB Output is correct
24 Correct 73 ms 17612 KB Output is correct
25 Correct 72 ms 17076 KB Output is correct
26 Correct 71 ms 16880 KB Output is correct
27 Correct 75 ms 16848 KB Output is correct
28 Correct 71 ms 17272 KB Output is correct
29 Incorrect 116 ms 17132 KB Output isn't correct
30 Halted 0 ms 0 KB -