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답안 #534367

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
534367 2022-03-08T06:07:13 Z skittles1412 Inside information (BOI21_servers) C++17
57 / 100
 245 ms 56988 KB 
#include "bits/extc++.h"
 
using namespace std;
 
template <typename T>
void dbgh(const T& t) {
	cerr << t << endl;
}
 
template <typename T, typename... U>
void dbgh(const T& t, const U&... u) {
	cerr << t << " | ";
	dbgh(u...);
}
 
#ifdef DEBUG
#define dbg(...)                                           \
	cerr << "L" << __LINE__ << " [" << #__VA_ARGS__ << "]" \
		 << ": ";                                          \
	dbgh(__VA_ARGS__)
#else
#define cerr   \
	if (false) \
	cerr
#define dbg(...)
#endif
 
#define endl "\n"
#define long int64_t
#define sz(x) int((x).size())
 
using Q = const vector<tuple<char, int, int>>&;
 
void yno(bool b) {
	if (b) {
		cout << "yes" << endl;
	} else {
		cout << "no" << endl;
	}
}
 
namespace s1 {
 
bool solve(int n, Q queries) {
	if (n > 4000) {
		return false;
	}
	vector<int> arr[n];
	for (int i = 0; i < n; i++) {
		arr[i] = {i};
	}
	int cnt[n] {};
	for (auto& [c, u, v] : queries) {
		if (c == 'S') {
			if (sz(arr[v]) > sz(arr[u])) {
				swap(arr[u], arr[v]);
			}
			vector<int> out(sz(arr[u]) + sz(arr[v]));
			merge(begin(arr[u]), end(arr[u]), begin(arr[v]), end(arr[v]), out.begin());
			arr[u] = out;
			swap(out, arr[v]);
			for (auto& a : arr[u]) {
				cnt[a]++;
			}
		} else if (c == 'Q') {
			if (binary_search(begin(arr[u]), end(arr[u]), v)) {
				cout << "yes" << endl;
			} else {
				cout << "no" << endl;
			}
		} else {
			cout << cnt[u] + 1 << endl;
		}
	}
	return true;
}
 
}  // namespace s1
 
namespace s2 {
 
bool solve(int n, Q queries) {
	for (auto& [c, u, v] : queries) {
		if (c == 'S' && u && v) {
			return false;
		}
	}
	vector<int> vals;
	int ord[n], oind = 0;
	memset(ord, -1, sizeof(ord));
	for (auto& [c, u, v] : queries) {
		if (c == 'S') {
			int x = u;
			if (!x) {
				x = v;
			}
			vals.push_back(x);
			ord[x] = oind++;
		} else if (c == 'Q') {
			if (u == v) {
				yno(true);
			} else if (u == 0) {
				yno(ord[v] != -1);
			} else if (v == 0) {
				yno(ord[u] != -1);
			} else {
				yno(ord[u] != -1 && ord[v] != -1 && ord[u] > ord[v]);
			}
		} else {
			if (u == 0) {
				cout << oind + 1 << endl;
			} else if (ord[u] == -1) {
				cout << 1 << endl;
			} else {
				cout << oind - ord[u] + 1 << endl;
			}
		}
	}
	return true;
}
 
}  // namespace s2
 
namespace s3 {
 
const int maxn = 2e5, logn = 20;
 
vector<pair<int, int>> graph[maxn];
int t, tin[maxn], tout[maxn], par[maxn], parv[maxn], lift1[logn][maxn], lift2[logn][maxn],
	liftv1[logn][maxn], liftv2[logn][maxn];
 
void dfs(int u, int p = -1) {
	tin[u] = t++;
	par[u] = lift1[0][u] = lift2[0][u] = p;
	for (auto& [v, w] : graph[u]) {
		if (v != p) {
			parv[v] = liftv1[0][v] = liftv2[0][v] = w;
			dfs(v, u);
		}
	}
	tout[u] = t++;
}
 
bool anc(int u, int v) {
	return tin[u] <= tin[v] && tout[v] <= tout[u];
}
 
template <typename T>
int blift(int u, int v, int lift[logn][maxn], int liftv[logn][maxn], const T& t) {
	if (anc(u, v)) {
		return u;
	}
	int prev = -1;
	for (int i = logn - 1; i >= 0; i--) {
		int p = lift[i][u];
		if (p != -1 && !anc(p, v)) {
			if (prev != -1 && !t(prev, parv[u])) {
				return -1;
			}
			prev = liftv[i][u];
			u = p;
		}
	}
	if (lift[0][u] == -1) {
		return -1;
	}
	if (prev != -1 && !t(prev, parv[u])) {
		return -1;
	}
	return u;
}
 
bool solve(int n, Q queries) {
	for (auto& [c, _u, _v] : queries) {
		if (c == 'C') {
			return false;
		}
	}
	int ct = 0;
	for (auto& [c, u, v] : queries) {
		if (c == 'S') {
			graph[u].emplace_back(v, ct);
			graph[v].emplace_back(u, ct);
			ct++;
		}
	}
	dfs(0);
	// 1 - increasing upwards
	// 2 - decreasing upwards
	for (int i = 1; i < logn; i++) {
		for (int j = 0; j < n; j++) {
			{
				int p = lift1[i - 1][j];
				if (p != -1 && liftv1[i - 1][j] < parv[p]) {
					lift1[i][j] = lift1[i - 1][p];
					liftv1[i][j] = liftv1[i - 1][p];
				} else {
					lift1[i][j] = -1;
				}
			}
			{
				int p = lift2[i - 1][j];
				if (p != -1 && liftv2[i - 1][j] > parv[p]) {
					lift2[i][j] = lift2[i - 1][p];
					liftv2[i][j] = liftv2[i - 1][p];
				} else {
					lift2[i][j] = -1;
				}
			}
		}
	}
	ct = -1;
	for (auto [c, u, v] : queries) {
		if (c == 'S') {
			ct++;
		} else {
			swap(u, v);
			if (u == v) {
				yno(true);
			} else {
				int cu = blift(u, v, lift1, liftv1, [&](int a, int b) -> bool {
					return a < b;
				});
				int cv = blift(v, u, lift2, liftv2, [&](int a, int b) -> bool {
					return b < a;
				});
				if (cu != -1 && cv != -1) {
					dbg(u, v, cu, cv, par[cu], par[cv]);
					int lca = anc(u, v) ? u : par[cu];
					dbg(lca);
					if (lca != (anc(v, u) ? v : par[cv])) {
						yno(false);
						continue;
					}
					assert(lca == (anc(v, u) ? v : par[cv]));
					if (anc(u, v)) {
						yno(parv[v] <= ct);
					} else if (anc(v, u)) {
						yno(parv[cu] <= ct);
					} else {
						yno(parv[cu] < parv[cv] && parv[v] <= ct);
					}
				} else {
					yno(false);
				}
			}
		}
	}
	return true;
}
 
}  // namespace s3
 
void solve() {
	int n, q;
	cin >> n >> q;
	vector<tuple<char, int, int>> queries(n + q - 1);
	for (auto& [c, u, v] : queries) {
		cin >> c;
		if (c != 'C') {
			cin >> u >> v;
			u--;
			v--;
		} else {
			cin >> u;
			u--;
		}
	}
	s3::solve(n, queries) || s2::solve(n, queries) || s1::solve(n, queries);
}
 
int main() {
	cin.tie(nullptr);
	ios_base::sync_with_stdio(false);
	cin.exceptions(ios::failbit);
	solve();
}

Subtask #1
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 7904 KB Output is correct
2 Correct 49 ms 9400 KB Output is correct
3 Correct 45 ms 9392 KB Output is correct
4 Correct 44 ms 9536 KB Output is correct
5 Correct 44 ms 9748 KB Output is correct
6 Correct 58 ms 9360 KB Output is correct

Subtask #2
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 7904 KB Output is correct
2 Correct 49 ms 9400 KB Output is correct
3 Correct 45 ms 9392 KB Output is correct
4 Correct 44 ms 9536 KB Output is correct
5 Correct 44 ms 9748 KB Output is correct
6 Correct 58 ms 9360 KB Output is correct
7 Correct 26 ms 7572 KB Output is correct
8 Correct 32 ms 8112 KB Output is correct
9 Correct 41 ms 13492 KB Output is correct
10 Correct 31 ms 8096 KB Output is correct
11 Correct 31 ms 8128 KB Output is correct
12 Correct 28 ms 8004 KB Output is correct

Subtask #3
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 7940 KB Output is correct
2 Correct 140 ms 37964 KB Output is correct
3 Correct 161 ms 38012 KB Output is correct

Subtask #4
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 7940 KB Output is correct
2 Correct 140 ms 37964 KB Output is correct
3 Correct 161 ms 38012 KB Output is correct
4 Correct 25 ms 7572 KB Output is correct
5 Correct 58 ms 11972 KB Output is correct
6 Correct 56 ms 11272 KB Output is correct
7 Correct 48 ms 11400 KB Output is correct

Subtask #5
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 7956 KB Output is correct
2 Correct 137 ms 47508 KB Output is correct
3 Correct 130 ms 47428 KB Output is correct
4 Correct 140 ms 52156 KB Output is correct

Subtask #6
0.5 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 7956 KB Output is correct
2 Correct 137 ms 47508 KB Output is correct
3 Correct 130 ms 47428 KB Output is correct
4 Correct 140 ms 52156 KB Output is correct
5 Correct 26 ms 7620 KB Output is correct
6 Partially correct 41 ms 10772 KB Output is incorrect
7 Partially correct 43 ms 10768 KB Output is incorrect
8 Partially correct 42 ms 10392 KB Output is incorrect
9 Partially correct 41 ms 10436 KB Output is incorrect

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 38 ms 7948 KB Output is correct
2 Correct 138 ms 40196 KB Output is correct
3 Correct 132 ms 41292 KB Output is correct

Subtask #8
0.5 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 38 ms 7948 KB Output is correct
2 Correct 138 ms 40196 KB Output is correct
3 Correct 132 ms 41292 KB Output is correct
4 Correct 29 ms 7572 KB Output is correct
5 Partially correct 50 ms 10628 KB Output is incorrect
6 Partially correct 43 ms 10632 KB Output is incorrect

Subtask #9
12.5 / 12.5

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 8004 KB Output is correct
2 Correct 121 ms 47428 KB Output is correct
3 Correct 141 ms 47440 KB Output is correct
4 Correct 139 ms 52120 KB Output is correct
5 Correct 33 ms 8080 KB Output is correct
6 Correct 147 ms 40232 KB Output is correct
7 Correct 127 ms 41356 KB Output is correct
8 Correct 177 ms 41860 KB Output is correct
9 Correct 157 ms 41668 KB Output is correct
10 Correct 158 ms 56988 KB Output is correct
11 Correct 245 ms 55488 KB Output is correct

Subtask #10
0.5 / 12.5

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 8004 KB Output is correct
2 Correct 121 ms 47428 KB Output is correct
3 Correct 141 ms 47440 KB Output is correct
4 Correct 139 ms 52120 KB Output is correct
5 Correct 33 ms 8080 KB Output is correct
6 Correct 147 ms 40232 KB Output is correct
7 Correct 127 ms 41356 KB Output is correct
8 Correct 177 ms 41860 KB Output is correct
9 Correct 157 ms 41668 KB Output is correct
10 Correct 158 ms 56988 KB Output is correct
11 Correct 245 ms 55488 KB Output is correct
12 Correct 25 ms 7620 KB Output is correct
13 Partially correct 41 ms 10696 KB Output is incorrect
14 Partially correct 42 ms 10760 KB Output is incorrect
15 Partially correct 39 ms 10436 KB Output is incorrect
16 Partially correct 37 ms 10384 KB Output is incorrect
17 Correct 22 ms 7572 KB Output is correct
18 Partially correct 39 ms 10692 KB Output is incorrect
19 Partially correct 42 ms 10632 KB Output is incorrect
20 Partially correct 42 ms 10656 KB Output is incorrect
21 Partially correct 45 ms 10768 KB Output is incorrect
22 Partially correct 36 ms 10504 KB Output is incorrect
23 Partially correct 41 ms 10764 KB Output is incorrect
24 Partially correct 49 ms 11076 KB Output is incorrect

Subtask #11
17.5 / 17.5

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 7956 KB Output is correct
2 Correct 45 ms 9408 KB Output is correct
3 Correct 61 ms 9396 KB Output is correct
4 Correct 48 ms 9488 KB Output is correct
5 Correct 39 ms 9632 KB Output is correct
6 Correct 41 ms 9416 KB Output is correct
7 Correct 42 ms 7972 KB Output is correct
8 Correct 140 ms 38024 KB Output is correct
9 Correct 134 ms 38016 KB Output is correct
10 Correct 30 ms 7876 KB Output is correct
11 Correct 129 ms 47536 KB Output is correct
12 Correct 130 ms 47420 KB Output is correct
13 Correct 176 ms 52120 KB Output is correct
14 Correct 31 ms 7952 KB Output is correct
15 Correct 143 ms 40260 KB Output is correct
16 Correct 134 ms 41256 KB Output is correct
17 Correct 175 ms 41748 KB Output is correct
18 Correct 148 ms 41888 KB Output is correct
19 Correct 189 ms 56968 KB Output is correct
20 Correct 205 ms 55500 KB Output is correct
21 Correct 198 ms 39928 KB Output is correct
22 Correct 152 ms 39664 KB Output is correct
23 Correct 166 ms 41188 KB Output is correct
24 Correct 162 ms 41476 KB Output is correct
25 Correct 156 ms 42640 KB Output is correct
26 Correct 127 ms 41092 KB Output is correct
27 Correct 107 ms 40964 KB Output is correct

Subtask #12
0.5 / 17.5

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 7956 KB Output is correct
2 Correct 45 ms 9408 KB Output is correct
3 Correct 61 ms 9396 KB Output is correct
4 Correct 48 ms 9488 KB Output is correct
5 Correct 39 ms 9632 KB Output is correct
6 Correct 41 ms 9416 KB Output is correct
7 Correct 42 ms 7972 KB Output is correct
8 Correct 140 ms 38024 KB Output is correct
9 Correct 134 ms 38016 KB Output is correct
10 Correct 30 ms 7876 KB Output is correct
11 Correct 129 ms 47536 KB Output is correct
12 Correct 130 ms 47420 KB Output is correct
13 Correct 176 ms 52120 KB Output is correct
14 Correct 31 ms 7952 KB Output is correct
15 Correct 143 ms 40260 KB Output is correct
16 Correct 134 ms 41256 KB Output is correct
17 Correct 175 ms 41748 KB Output is correct
18 Correct 148 ms 41888 KB Output is correct
19 Correct 189 ms 56968 KB Output is correct
20 Correct 205 ms 55500 KB Output is correct
21 Correct 198 ms 39928 KB Output is correct
22 Correct 152 ms 39664 KB Output is correct
23 Correct 166 ms 41188 KB Output is correct
24 Correct 162 ms 41476 KB Output is correct
25 Correct 156 ms 42640 KB Output is correct
26 Correct 127 ms 41092 KB Output is correct
27 Correct 107 ms 40964 KB Output is correct
28 Correct 24 ms 7584 KB Output is correct
29 Correct 30 ms 8160 KB Output is correct
30 Correct 43 ms 13512 KB Output is correct
31 Correct 31 ms 8096 KB Output is correct
32 Correct 28 ms 8004 KB Output is correct
33 Correct 35 ms 7992 KB Output is correct
34 Correct 24 ms 7620 KB Output is correct
35 Correct 60 ms 12036 KB Output is correct
36 Correct 40 ms 11204 KB Output is correct
37 Correct 45 ms 11356 KB Output is correct
38 Correct 24 ms 7620 KB Output is correct
39 Partially correct 42 ms 10764 KB Output is incorrect
40 Partially correct 43 ms 10820 KB Output is incorrect
41 Partially correct 36 ms 10392 KB Output is incorrect
42 Partially correct 37 ms 10404 KB Output is incorrect
43 Correct 24 ms 7568 KB Output is correct
44 Partially correct 41 ms 10632 KB Output is incorrect
45 Partially correct 41 ms 10640 KB Output is incorrect
46 Partially correct 38 ms 10692 KB Output is incorrect
47 Partially correct 42 ms 10764 KB Output is incorrect
48 Partially correct 38 ms 10424 KB Output is incorrect
49 Partially correct 41 ms 10784 KB Output is incorrect
50 Partially correct 43 ms 11076 KB Output is incorrect
51 Partially correct 40 ms 10632 KB Output is incorrect
52 Partially correct 45 ms 10436 KB Output is incorrect
53 Partially correct 46 ms 10124 KB Output is incorrect
54 Partially correct 36 ms 10644 KB Output is incorrect
55 Partially correct 35 ms 10380 KB Output is incorrect
56 Partially correct 44 ms 10772 KB Output is incorrect
57 Partially correct 38 ms 10508 KB Output is incorrect
58 Partially correct 40 ms 10568 KB Output is incorrect
59 Partially correct 44 ms 11140 KB Output is incorrect