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답안 #721601

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
721601 2023-04-11T05:27:45 Z pavement 별자리 3 (JOI20_constellation3) C++17
100 / 100
 710 ms 103500 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define int long long
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ppb pop_back
#define eb emplace_back
#define g0(a) get<0>(a)
#define g1(a) get<1>(a)
#define g2(a) get<2>(a)
#define g3(a) get<3>(a)
#define g4(a) get<4>(a)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
using db = double;
using ll = long long;
using ld = long double;
using ii = pair<int, int>;
using iii = tuple<int, int, int>;
using iiii = tuple<int, int, int, int>;
using iiiii = tuple<int, int, int, int, int>;
template<class key, class value = null_type, class cmp = less<key> >
using ordered_set = tree<key, value, cmp, rb_tree_tag, tree_order_statistics_node_update>;

int N, M, idx, tot, A[200005], X[200005], Y[200005], C[200005], min_l[200005], min_r[200005], lab[200005], L[200005], R[200005], H[200005], ft1[200005], ft2[200005], a[200005], b[200005], sz[200005], anc[25][200005];
stack<int> S;
vector<int> adj[200005], vec[200005];

void construct(int l, int r, int par = -1) {
	if (l > r) return;
	int cur = ++idx;
	if (par != -1) {
		adj[par].pb(cur);
	}
	int mid = -1;
	for (int i = l, j = r; i <= j; i++, j--) {
		if (min_l[i] < l && min_r[i] > r) {
			mid = i;
			break;
		}
		if (min_l[j] < l && min_r[j] > r) {
			mid = j;
			break;
		}
	}
	assert(mid != -1);
	L[cur] = l;
	R[cur] = r;
	H[cur] = A[mid] + 1;
	lab[mid] = cur;
	construct(l, mid - 1, cur);
	construct(mid + 1, r, cur);
}

int dfs(int n) {
	for (int k = 1; k <= 20; k++) {
		if (anc[k - 1][n] == -1) break;
		anc[k][n] = anc[k - 1][anc[k - 1][n]];
	}
	for (auto u : adj[n]) {
		anc[0][u] = n;
		sz[n] += dfs(u);
	}
	return ++sz[n];
}

inline int ls(int x) { return x & -x; }

void upd1(int l, int r, int v) {
	for (; l <= N; l += ls(l)) ft1[l] += v;
	for (r++; r <= N; r += ls(r)) ft1[r] -= v;
}

void upd2(int l, int r, int v) {
	for (; l <= N; l += ls(l)) ft2[l] += v;
	for (r++; r <= N; r += ls(r)) ft2[r] -= v;
}

int qry1(int p) {
	int r = 0;
	for (; p; p -= ls(p)) r += ft1[p];
	return r;
}

int qry2(int p) {
	int r = 0;
	for (; p; p -= ls(p)) r += ft2[p];
	return r;
}

int dp(int n, int e = -1) {
	int ret = 0;
	for (auto u : adj[n]) ret += dp(u, n);
	upd1(n, n + sz[n] - 1, ret);
	for (auto i : vec[n])
		ret = max(ret, qry1(a[i]) + qry1(b[i]) - qry1(n) - (qry2(a[i]) + qry2(b[i]) - qry2(n)) + C[i]);
	upd2(n, n + sz[n] - 1, ret);
	return ret;
}

main() {
	memset(anc, -1, sizeof anc);
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N;
	for (int i = 1; i <= N; i++) {
		cin >> A[i];
	}
	cin >> M;
	for (int i = 1; i <= M; i++) {
		cin >> X[i] >> Y[i] >> C[i];
		tot += C[i];
	}
	for (int i = 1; i <= N; i++) {
		while (!S.empty() && A[S.top()] <= A[i]) S.pop();
		min_l[i] = (S.empty() ? 0 : S.top());
		S.push(i);
	}
	while (!S.empty()) S.pop();
	for (int i = N; i >= 1; i--) {
		while (!S.empty() && A[S.top()] <= A[i]) S.pop();
		min_r[i] = (S.empty() ? N + 1 : S.top());
		S.push(i);
	}
	construct(1, N);
	dfs(1);
	for (int i = 1; i <= M; i++) {
		assert(H[lab[X[i]]] <= Y[i]);
		int cur = lab[X[i]];
		for (int k = 20; k >= 0; k--) {
			if (anc[k][cur] != -1 && H[anc[k][cur]] <= Y[i]) {
				cur = anc[k][cur];
			}
		}
		a[i] = lab[X[i]];
		b[i] = cur;
		vec[b[i]].pb(i);
	}
	cout << tot - dp(1) << '\n';
}

Compilation message

constellation3.cpp:104:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  104 | main() {
      | ^~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 48980 KB Output is correct
2 Correct 22 ms 48940 KB Output is correct
3 Correct 22 ms 49004 KB Output is correct
4 Correct 21 ms 48976 KB Output is correct
5 Correct 20 ms 48956 KB Output is correct
6 Correct 21 ms 48992 KB Output is correct
7 Correct 21 ms 48980 KB Output is correct
8 Correct 20 ms 48980 KB Output is correct
9 Correct 23 ms 48972 KB Output is correct
10 Correct 20 ms 49012 KB Output is correct
11 Correct 20 ms 49016 KB Output is correct
12 Correct 21 ms 49000 KB Output is correct
13 Correct 22 ms 48904 KB Output is correct
14 Correct 20 ms 48932 KB Output is correct
15 Correct 20 ms 49028 KB Output is correct
16 Correct 21 ms 49004 KB Output is correct
17 Correct 20 ms 48984 KB Output is correct
18 Correct 21 ms 49024 KB Output is correct
19 Correct 19 ms 48980 KB Output is correct
20 Correct 20 ms 48972 KB Output is correct
21 Correct 21 ms 48928 KB Output is correct
22 Correct 20 ms 49000 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 48980 KB Output is correct
2 Correct 22 ms 48940 KB Output is correct
3 Correct 22 ms 49004 KB Output is correct
4 Correct 21 ms 48976 KB Output is correct
5 Correct 20 ms 48956 KB Output is correct
6 Correct 21 ms 48992 KB Output is correct
7 Correct 21 ms 48980 KB Output is correct
8 Correct 20 ms 48980 KB Output is correct
9 Correct 23 ms 48972 KB Output is correct
10 Correct 20 ms 49012 KB Output is correct
11 Correct 20 ms 49016 KB Output is correct
12 Correct 21 ms 49000 KB Output is correct
13 Correct 22 ms 48904 KB Output is correct
14 Correct 20 ms 48932 KB Output is correct
15 Correct 20 ms 49028 KB Output is correct
16 Correct 21 ms 49004 KB Output is correct
17 Correct 20 ms 48984 KB Output is correct
18 Correct 21 ms 49024 KB Output is correct
19 Correct 19 ms 48980 KB Output is correct
20 Correct 20 ms 48972 KB Output is correct
21 Correct 21 ms 48928 KB Output is correct
22 Correct 20 ms 49000 KB Output is correct
23 Correct 21 ms 49164 KB Output is correct
24 Correct 21 ms 49236 KB Output is correct
25 Correct 22 ms 49228 KB Output is correct
26 Correct 21 ms 49280 KB Output is correct
27 Correct 22 ms 49268 KB Output is correct
28 Correct 22 ms 49256 KB Output is correct
29 Correct 22 ms 49272 KB Output is correct
30 Correct 21 ms 49236 KB Output is correct
31 Correct 23 ms 49320 KB Output is correct
32 Correct 22 ms 49396 KB Output is correct
33 Correct 25 ms 49304 KB Output is correct
34 Correct 21 ms 49320 KB Output is correct
35 Correct 22 ms 49268 KB Output is correct
36 Correct 24 ms 49452 KB Output is correct
37 Correct 23 ms 49456 KB Output is correct
38 Correct 22 ms 49492 KB Output is correct
39 Correct 22 ms 49264 KB Output is correct
40 Correct 23 ms 49364 KB Output is correct
41 Correct 22 ms 49236 KB Output is correct
42 Correct 24 ms 49296 KB Output is correct
43 Correct 23 ms 49404 KB Output is correct
44 Correct 22 ms 49236 KB Output is correct

Subtask #3
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 48980 KB Output is correct
2 Correct 22 ms 48940 KB Output is correct
3 Correct 22 ms 49004 KB Output is correct
4 Correct 21 ms 48976 KB Output is correct
5 Correct 20 ms 48956 KB Output is correct
6 Correct 21 ms 48992 KB Output is correct
7 Correct 21 ms 48980 KB Output is correct
8 Correct 20 ms 48980 KB Output is correct
9 Correct 23 ms 48972 KB Output is correct
10 Correct 20 ms 49012 KB Output is correct
11 Correct 20 ms 49016 KB Output is correct
12 Correct 21 ms 49000 KB Output is correct
13 Correct 22 ms 48904 KB Output is correct
14 Correct 20 ms 48932 KB Output is correct
15 Correct 20 ms 49028 KB Output is correct
16 Correct 21 ms 49004 KB Output is correct
17 Correct 20 ms 48984 KB Output is correct
18 Correct 21 ms 49024 KB Output is correct
19 Correct 19 ms 48980 KB Output is correct
20 Correct 20 ms 48972 KB Output is correct
21 Correct 21 ms 48928 KB Output is correct
22 Correct 20 ms 49000 KB Output is correct
23 Correct 21 ms 49164 KB Output is correct
24 Correct 21 ms 49236 KB Output is correct
25 Correct 22 ms 49228 KB Output is correct
26 Correct 21 ms 49280 KB Output is correct
27 Correct 22 ms 49268 KB Output is correct
28 Correct 22 ms 49256 KB Output is correct
29 Correct 22 ms 49272 KB Output is correct
30 Correct 21 ms 49236 KB Output is correct
31 Correct 23 ms 49320 KB Output is correct
32 Correct 22 ms 49396 KB Output is correct
33 Correct 25 ms 49304 KB Output is correct
34 Correct 21 ms 49320 KB Output is correct
35 Correct 22 ms 49268 KB Output is correct
36 Correct 24 ms 49452 KB Output is correct
37 Correct 23 ms 49456 KB Output is correct
38 Correct 22 ms 49492 KB Output is correct
39 Correct 22 ms 49264 KB Output is correct
40 Correct 23 ms 49364 KB Output is correct
41 Correct 22 ms 49236 KB Output is correct
42 Correct 24 ms 49296 KB Output is correct
43 Correct 23 ms 49404 KB Output is correct
44 Correct 22 ms 49236 KB Output is correct
45 Correct 358 ms 85520 KB Output is correct
46 Correct 400 ms 84960 KB Output is correct
47 Correct 416 ms 85052 KB Output is correct
48 Correct 397 ms 85072 KB Output is correct
49 Correct 375 ms 84564 KB Output is correct
50 Correct 356 ms 84388 KB Output is correct
51 Correct 345 ms 84664 KB Output is correct
52 Correct 378 ms 85480 KB Output is correct
53 Correct 395 ms 84932 KB Output is correct
54 Correct 603 ms 95784 KB Output is correct
55 Correct 588 ms 92252 KB Output is correct
56 Correct 577 ms 90156 KB Output is correct
57 Correct 554 ms 89132 KB Output is correct
58 Correct 493 ms 99816 KB Output is correct
59 Correct 473 ms 99716 KB Output is correct
60 Correct 206 ms 103500 KB Output is correct
61 Correct 313 ms 84576 KB Output is correct
62 Correct 710 ms 98340 KB Output is correct
63 Correct 334 ms 84296 KB Output is correct
64 Correct 315 ms 83520 KB Output is correct
65 Correct 576 ms 98452 KB Output is correct
66 Correct 313 ms 84288 KB Output is correct