oj.uz

답안 #1054142

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1054142 2024-08-12T06:52:09 Z Gromp15 식물 비교 (IOI20_plants) C++17
44 / 100
 417 ms 32552 KB 
#include <bits/stdc++.h>
#define ll long long
#include "plants.h"
#define ar array
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
using namespace std;

const int INF = 1e9;

struct seg {
	int N; vector<ar<int, 2>> tree; vector<int> lazy;
	void pull(int node) {
		tree[node] = min(tree[node*2], tree[node*2+1]);
	}
	void push(int node) {
		if (!lazy[node]) return;
		tree[node][0] += lazy[node];
		if (node < N) lazy[node*2] += lazy[node], lazy[node*2+1] += lazy[node];
		lazy[node] = 0;
	}
	seg(int n, const vector<int>& r) : N(1<<(__lg(n)+1)), tree(2*N), lazy(2*N) {
		for (int i = 0; i < n; i++) tree[i+N] = {r[i], i};
		for (int i = N-1; i >= 1; i--) pull(i);
	}
	ar<int, 2> query(int node, int nl, int nr, int ql, int qr) {
		push(node);
		if (ql > nr || qr < nl) return {INF};
		if (ql <= nl && nr <= qr) return tree[node];
		int mid = (nl+nr)/2;
		return min(query(node*2, nl, mid, ql, qr), query(node*2+1, mid+1, nr, ql, qr));
	}
	void update(int node, int nl, int nr, int ql, int qr, int v) {
		push(node);
		if (ql > nr || qr < nl) return;
		if (ql <= nl && nr <= qr) {
			lazy[node] += v; push(node); return;
		}
		int mid = (nl+nr)/2;
		update(node*2, nl, mid, ql, qr, v), update(node*2+1, mid+1, nr, ql, qr, v);
		pull(node);
	}
};
int n, k;
vector<int> got;
vector<int> r;

void init(int _k, std::vector<int> _r) {
	k = _k;
	r = _r;
	n = sz(r);
	seg st(n, r);
	got.resize(n);
	set<int> in;
	set<ar<int, 2>> where;
	auto dist = [&](int x) {
		return x < 0 ? x + n : x;
	};
	auto add = [&](int pos) {
		//cout << "Add " << pos << endl;
		assert(!in.count(pos));
		if (in.size() > 1) {
			auto it = in.lower_bound(pos);
			int R = it != in.end() ? *it : *in.begin();
			int L = it != in.begin() ? *prev(it) : *prev(in.end());
			assert(where.count({dist(R - L), R}));
			where.erase({dist(R - L), R});
			where.insert({dist(R - pos), R});
			where.insert({dist(pos - L), pos});
		}
		else if (in.size() == 1) {
			int other = *in.begin();
			assert(where.size() == 1);
			assert((*where.begin())[0] == n);
			where.erase(where.begin());
			where.insert({dist(other - pos), other});
			where.insert({dist(pos - other), pos});
		}
		else {
			where.insert({n, pos});
		}
		in.insert(pos);
	};
	auto rem = [&](int pos) {
		//cout << "Rem " << pos << endl;
		assert(in.count(pos));
		if (in.size() == 1) {
			in.erase(in.begin());
			where.erase(where.begin());
		}
		else if (in.size() == 2) {
			int other = *in.begin() == pos ? *next(in.begin()) : *in.begin();
			assert(where.count({dist(pos - other), pos}));
			in.erase(pos);
			where.erase(where.begin());
			where.erase(where.begin());
			where.insert({n, other});
		}
		else {
			auto it = in.upper_bound(pos);
			int R = it != in.end() ? *it : *in.begin();
			auto it2 = in.lower_bound(pos);
			int L = it2 != in.begin() ? *prev(it2) : *prev(in.end());
			assert(where.count({dist(R - pos), R}));
			assert(where.count({dist(pos - L), pos}));
			where.erase({dist(R - pos), R});
			where.erase({dist(pos - L), pos});
			where.insert({dist(R - L), R});
			in.erase(pos);
		}
	};
	int on = n;
	while (1) {
		/*
		cout << "Cur\n";
		for (int i = 0; i < n; i++) cout << st.query(1, 0, st.N-1, i, i)[0] << " \n"[i==n-1];
		cout.flush();
		*/
		auto q = st.query(1, 0, st.N-1, 0, n-1);
		if (!q[0]) { 
			add(q[1]);
			st.update(1, 0, st.N-1, q[1], q[1], INF);
		}
		else {
			if (where.empty()) break;
			auto [val, pos] = *prev(where.end());
			assert(val >= k);
			rem(pos);
			got[pos] = on--;
			int L = pos - k + 1, R = pos - 1;
			if (L < 0) L += n;
			if (R < 0) R += n;
			if (L <= R) st.update(1, 0, st.N-1, L, R, -1);
			else {
				st.update(1, 0, st.N-1, 0, R, -1);
				st.update(1, 0, st.N-1, L, n-1, -1);
			}
		}
	}
}

bool win(int x, int y) {
	return got[x] > got[y];
}

int compare_plants(int x, int y) {
	int w1 = win(x, y), w2 = win(y, x);
	assert(w1 || w2);
	return w1 && w2 ? 0 : w1 ? 1 : -1;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 2 ms 444 KB Output is correct
7 Correct 30 ms 4688 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 2 ms 348 KB Output is correct
10 Correct 31 ms 4604 KB Output is correct
11 Correct 32 ms 4848 KB Output is correct
12 Correct 29 ms 4696 KB Output is correct
13 Correct 35 ms 4688 KB Output is correct

Subtask #3
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 2 ms 444 KB Output is correct
7 Correct 30 ms 4688 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 2 ms 348 KB Output is correct
10 Correct 31 ms 4604 KB Output is correct
11 Correct 32 ms 4848 KB Output is correct
12 Correct 29 ms 4696 KB Output is correct
13 Correct 35 ms 4688 KB Output is correct
14 Correct 55 ms 5460 KB Output is correct
15 Correct 268 ms 14116 KB Output is correct
16 Correct 61 ms 4944 KB Output is correct
17 Correct 275 ms 13904 KB Output is correct
18 Correct 410 ms 23124 KB Output is correct
19 Correct 174 ms 13916 KB Output is correct
20 Correct 284 ms 13904 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 27 ms 4416 KB Output is correct
4 Correct 251 ms 20052 KB Output is correct
5 Correct 282 ms 15188 KB Output is correct
6 Correct 293 ms 14016 KB Output is correct
7 Correct 295 ms 13904 KB Output is correct
8 Correct 275 ms 13904 KB Output is correct
9 Correct 284 ms 18364 KB Output is correct
10 Correct 281 ms 15264 KB Output is correct
11 Correct 393 ms 32552 KB Output is correct
12 Correct 145 ms 13648 KB Output is correct
13 Correct 417 ms 27020 KB Output is correct

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -