oj.uz

Submission #347314

# Submission time Handle Problem Language Result Execution time Memory
347314 2021-01-12T14:07:49 Z guka415 Long Mansion (JOI17_long_mansion) C++14
25 / 100
 3000 ms 184916 KB 
#define _CRT_SECURE_NO_WARNINGS
#define fast ios::sync_with_stdio(false); cin.tie(0)
#define foru(i, k, n) for (int i = k; i < n; i++)
#define ford(i, k, n) for (int i = k; i >= n; i--)
#define pb push_back
#define ff first
#define ss second

#include <iostream>
#include <vector>
#include <algorithm>
#include <bitset>
#include <queue>
#include <unordered_set>
#include <set>

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int sz = 5e5 + 5;
int n, m, c[sz], nc[sz];
vector<int> a[sz], na[sz], adj[sz];
int lfinal[sz], rfinal[sz], closestL[sz], closestR[sz], lmn[sz], rmx[sz];
short connectedTo[sz];
vector<pii> comps;
vector<int> top;
set<int> st[sz];

void input() {
	scanf("%d", &n);
	foru(i, 0, n - 1) {
		scanf("%d", &c[i]); c[i]--;
	}
	foru(i, 0, n) {
		int tmp, xx;
		scanf("%d", &tmp);
		while (tmp--) {
			scanf("%d", &xx);
			a[i].pb(--xx);
		}
	}
}

void computeConnectedTo() {
	foru(i, 0, n) {
		bool found = 0;
		if (i != 0) {
			for (int x : a[i]) {
				if (x == c[i - 1]) {
					connectedTo[i] = -1;
					found = 1;
					break;
				}
			}
			if (found)continue;
		}
		if (i != n - 1) {
			for (int x : a[i]) {
				if (x == c[i]) {
					connectedTo[i] = 1;
					found = 1;
					break;
				}
			}
			if (found)continue;
		}
	}
}

void computeComps() {
	int prvStart = 0;
	foru(i, 0, n) {
		if (i == n - 1 || connectedTo[i] != 1 || connectedTo[i + 1] != -1) {
			comps.pb({ prvStart,i });
			prvStart = i + 1;
		}
	}
	m = comps.size();
	unordered_set<int> mem;
	foru(i, 0, m) {
		mem.clear();
		foru(j, comps[i].ff, comps[i].ss + 1) {
			for (int x : a[j])mem.insert(x);
		}
		for (int x : mem) {
			na[i].pb(x);
			st[x].insert(i);
		}
		if (connectedTo[comps[i].ff] == -1)adj[i - 1].pb(i);
		if (connectedTo[comps[i].ss] == 1)adj[i + 1].pb(i);
		if (i != m - 1)nc[i] = c[comps[i].ss];
		lfinal[i] = rfinal[i] = i;
	}
}

void topoSort() {
	vector<int> indeg(m, 0);
	foru(i, 0, m) {
		for (int x : adj[i])indeg[x]++;
	}
	queue<int> q;
	foru(i, 0, m) {
		if (indeg[i] == 0)q.push(i);
	}
	while (!q.empty()) {
		int x = q.front(); q.pop();
		top.pb(x);
		for (int y : adj[x]) {
			indeg[y]--;
			if (indeg[y] == 0)q.push(y);
		}
	}
}

void computeClosest() {
	for (int i = 0; i < n; i++) {
		st[i].insert(-1), st[i].insert(m + 1);
	}
	for (int i = 0; i < m - 1; i++) {
		auto it = st[nc[i]].upper_bound(i);
		closestR[i] = (*it);
		--it;
		closestL[i] = (*it);
	}
}

void computeRanges() {
	int src;
	foru(i, 0, m) {
		src = top[i];
		if (connectedTo[comps[src].ff] == 0 && connectedTo[comps[src].ss] == 0)continue;
		else if (connectedTo[comps[src].ss] == 1) {
			if (lfinal[src + 1] <= src) {
				lfinal[src] = lfinal[src + 1];
				rfinal[src] = rfinal[src + 1];
				continue;
			}
			lfinal[src] = min(lfinal[src], lfinal[src + 1]);
			rfinal[src] = max(rfinal[src], rfinal[src + 1]);
		}
		else if (connectedTo[comps[src].ff] == -1) {
			if (rfinal[src - 1] >= src) {
				lfinal[src] = lfinal[src - 1];
				rfinal[src] = rfinal[src - 1];
				continue;
			}
			lfinal[src] = min(lfinal[src], lfinal[src - 1]);
			rfinal[src] = max(rfinal[src], rfinal[src - 1]);
		}
		while (true) {
			if (rfinal[src] != m - 1 && closestL[rfinal[src]] >= lfinal[src]) rfinal[src]++;
			else if (lfinal[src] != 0 && closestR[lfinal[src] - 1] <= rfinal[src]) lfinal[src]--;
			else break;
		}
	}
}

void computeFinal() {
	foru(i, 0, m) {
		foru(j, comps[i].ff, comps[i].ss + 1) {
			lmn[j] = comps[lfinal[i]].ff;
			rmx[j] = comps[rfinal[i]].ss;
		}
	}
}

int main() {
	fast;
	input();
	computeConnectedTo();
	computeComps();
	topoSort();
	computeClosest();
	computeRanges();
	computeFinal();
	int q, x, y;
	scanf("%d", &q);
	while (q--) {
		scanf("%d %d", &x, &y);
		x--; y--;
		if (y >= lmn[x] && y <= rmx[x])printf("YES\n");
		else printf("NO\n");
	}
	return 0;
}

Compilation message

long_mansion.cpp: In function 'void input()':
long_mansion.cpp:33:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   33 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
long_mansion.cpp:35:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   35 |   scanf("%d", &c[i]); c[i]--;
      |   ~~~~~^~~~~~~~~~~~~
long_mansion.cpp:39:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   39 |   scanf("%d", &tmp);
      |   ~~~~~^~~~~~~~~~~~
long_mansion.cpp:41:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   41 |    scanf("%d", &xx);
      |    ~~~~~^~~~~~~~~~~
long_mansion.cpp: In function 'int main()':
long_mansion.cpp:180:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  180 |  scanf("%d", &q);
      |  ~~~~~^~~~~~~~~~
long_mansion.cpp:182:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  182 |   scanf("%d %d", &x, &y);
      |   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 59756 KB Output is correct
2 Correct 43 ms 60012 KB Output is correct
3 Correct 49 ms 60396 KB Output is correct
4 Correct 40 ms 59756 KB Output is correct
5 Correct 40 ms 59884 KB Output is correct
6 Correct 41 ms 59756 KB Output is correct
7 Correct 40 ms 59628 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 59756 KB Output is correct
2 Correct 43 ms 60012 KB Output is correct
3 Correct 49 ms 60396 KB Output is correct
4 Correct 40 ms 59756 KB Output is correct
5 Correct 40 ms 59884 KB Output is correct
6 Correct 41 ms 59756 KB Output is correct
7 Correct 40 ms 59628 KB Output is correct
8 Correct 174 ms 61292 KB Output is correct
9 Correct 190 ms 61292 KB Output is correct
10 Correct 176 ms 61676 KB Output is correct
11 Correct 180 ms 62188 KB Output is correct
12 Correct 168 ms 61420 KB Output is correct
13 Correct 186 ms 61540 KB Output is correct
14 Correct 175 ms 61548 KB Output is correct
15 Correct 173 ms 61676 KB Output is correct
16 Correct 172 ms 61932 KB Output is correct
17 Correct 171 ms 61508 KB Output is correct
18 Correct 177 ms 61548 KB Output is correct
19 Correct 171 ms 61676 KB Output is correct
20 Correct 166 ms 61804 KB Output is correct
21 Correct 168 ms 61932 KB Output is correct
22 Correct 172 ms 61548 KB Output is correct
23 Correct 172 ms 61292 KB Output is correct
24 Correct 175 ms 61292 KB Output is correct
25 Correct 172 ms 61288 KB Output is correct
26 Correct 170 ms 61336 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1271 ms 103648 KB Output is correct
2 Correct 1950 ms 102560 KB Output is correct
3 Correct 2759 ms 100576 KB Output is correct
4 Correct 1465 ms 103376 KB Output is correct
5 Correct 1605 ms 103044 KB Output is correct
6 Correct 1098 ms 90720 KB Output is correct
7 Correct 888 ms 92512 KB Output is correct
8 Correct 706 ms 92824 KB Output is correct
9 Correct 628 ms 93024 KB Output is correct
10 Correct 463 ms 93536 KB Output is correct
11 Correct 463 ms 93408 KB Output is correct

Subtask #4
0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 59756 KB Output is correct
2 Correct 43 ms 60012 KB Output is correct
3 Correct 49 ms 60396 KB Output is correct
4 Correct 40 ms 59756 KB Output is correct
5 Correct 40 ms 59884 KB Output is correct
6 Correct 41 ms 59756 KB Output is correct
7 Correct 40 ms 59628 KB Output is correct
8 Correct 174 ms 61292 KB Output is correct
9 Correct 190 ms 61292 KB Output is correct
10 Correct 176 ms 61676 KB Output is correct
11 Correct 180 ms 62188 KB Output is correct
12 Correct 168 ms 61420 KB Output is correct
13 Correct 186 ms 61540 KB Output is correct
14 Correct 175 ms 61548 KB Output is correct
15 Correct 173 ms 61676 KB Output is correct
16 Correct 172 ms 61932 KB Output is correct
17 Correct 171 ms 61508 KB Output is correct
18 Correct 177 ms 61548 KB Output is correct
19 Correct 171 ms 61676 KB Output is correct
20 Correct 166 ms 61804 KB Output is correct
21 Correct 168 ms 61932 KB Output is correct
22 Correct 172 ms 61548 KB Output is correct
23 Correct 172 ms 61292 KB Output is correct
24 Correct 175 ms 61292 KB Output is correct
25 Correct 172 ms 61288 KB Output is correct
26 Correct 170 ms 61336 KB Output is correct
27 Correct 1271 ms 103648 KB Output is correct
28 Correct 1950 ms 102560 KB Output is correct
29 Correct 2759 ms 100576 KB Output is correct
30 Correct 1465 ms 103376 KB Output is correct
31 Correct 1605 ms 103044 KB Output is correct
32 Correct 1098 ms 90720 KB Output is correct
33 Correct 888 ms 92512 KB Output is correct
34 Correct 706 ms 92824 KB Output is correct
35 Correct 628 ms 93024 KB Output is correct
36 Correct 463 ms 93536 KB Output is correct
37 Correct 463 ms 93408 KB Output is correct
38 Correct 1195 ms 164564 KB Output is correct
39 Correct 1086 ms 184916 KB Output is correct
40 Correct 986 ms 144848 KB Output is correct
41 Execution timed out 3063 ms 179796 KB Time limit exceeded
42 Halted 0 ms 0 KB -