oj.uz

Submission #90477

# Submission time Handle Problem Language Result Execution time Memory
90477 2018-12-21T19:48:00 Z radoslav11 Bitaro’s Party (JOI18_bitaro) C++14
100 / 100
 1451 ms 400676 KB 
#include <bits/stdc++.h>
#define endl '\n'

#define SZ(x) ((int)x.size())
#define pb push_back

using namespace std;
template<class T, class T2> inline void chkmax(T &x, const T2 &y) { if(x < y) x = y; }
template<class T, class T2> inline void chkmin(T &x, const T2 &y) { if(x > y) x = y; }
const int MAXN = (int)1e5 + 17 + 42;
const int B = 200;

int n, m, q;
vector<int> adj[MAXN];

void read()
{
	cin >> n >> m >> q;
	for(int i = 0; i < m; i++)
	{
		int u, v;
		cin >> u >> v;
		adj[v].push_back(u);
	}
}

bool ok[MAXN];

int _dp[MAXN];
int Tm_vis[MAXN], cnt_t;
int TMS = 0;

vector<pair<int, int> > dp[MAXN];

int rec(int u)
{
	if(Tm_vis[u] >= cnt_t) return _dp[u];
	Tm_vis[u] = cnt_t;
	if(ok[u]) _dp[u] = 0;
	else _dp[u] = -1e9;

	for(int v: adj[u])
		chkmax(_dp[u], rec(v) + 1);

	return _dp[u];
}

int solve_brute(int u, vector<int> blocked)
{
	for(int x: blocked) ok[x] = 0;
	cnt_t++;
	int ans = rec(u);
	for(int x: blocked) ok[x] = 1;
	return ans < 0 ? -1 : ans;
}

bool same[MAXN];

bool cmp(pair<int, int> a, pair<int, int> b) { return a.second > b.second; }

int USED[MAXN];

vector<pair<int, int> > merge(vector<pair<int, int> > a, vector<pair<int, int> > b)
{
	for(auto &it: b) it.second++;

	int po_b = 0;
	vector<pair<int, int> > ret;
	for(auto it: a) 
	{
		while(po_b < SZ(b) && b[po_b].second > it.second)
		{
			if(USED[b[po_b].first] != -1) { po_b++; continue; }
			else
			{
				USED[b[po_b].first] = 1;
				ret.pb(b[po_b]);
				po_b++;
			}
		}

		if(USED[it.first] != -1) continue;
		USED[it.first] = 1;
		ret.pb(it);
	}

	while(po_b < SZ(b))
	{
		if(USED[b[po_b].first] != -1) { po_b++; continue; }
		else
		{
			USED[b[po_b].first] = 1;
			ret.pb(b[po_b]);
			po_b++;
		}
	}

	for(auto it: ret) USED[it.first] = -1;
	while(SZ(ret) > B) ret.pop_back();
	return ret;
}

void solve()
{
	memset(USED, -1, sizeof(USED));
	for(int i = 1; i <= n; i++) ok[i] = 1;

	for(int u = 1; u <= n; u++)
	{
		dp[u].push_back({u, 0});
		for(auto v: adj[u])
			dp[u] = merge(dp[u], dp[v]);
	}

	while(q--)
	{
		int st, sz;
		vector<int> li;

		cin >> st >> sz;
		for(int i = 0; i < sz; i++)
		{
			int x;
			cin >> x;
			li.push_back(x);
		}

		vector<int> initial_li = li;

		if(li.size() >= B)
		{
			cout << solve_brute(st, li) << endl;
			continue;
		}

		for(auto it: li) same[it] = 1;

		int answer = 0;
		for(auto it: dp[st])
			if(!same[it.first])
				chkmax(answer, it.second);

		for(auto it: li) same[it] = 0;

		if(answer < 0) answer = -1;
		if(answer == 0)
		{
			for(auto it: initial_li)
				if(it == st) answer = -1;
		}

		cout << answer << endl;
	}
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	read();
	solve();
	return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 5496 KB Output is correct
2 Correct 5 ms 5500 KB Output is correct
3 Correct 5 ms 5544 KB Output is correct
4 Correct 5 ms 5684 KB Output is correct
5 Correct 8 ms 6240 KB Output is correct
6 Correct 8 ms 6240 KB Output is correct
7 Correct 8 ms 6240 KB Output is correct
8 Correct 13 ms 7620 KB Output is correct
9 Correct 12 ms 7620 KB Output is correct
10 Correct 14 ms 7620 KB Output is correct
11 Correct 12 ms 7620 KB Output is correct
12 Correct 11 ms 7620 KB Output is correct
13 Correct 13 ms 7620 KB Output is correct
14 Correct 11 ms 7620 KB Output is correct
15 Correct 10 ms 7620 KB Output is correct
16 Correct 12 ms 7620 KB Output is correct
17 Correct 12 ms 7620 KB Output is correct
18 Correct 10 ms 7620 KB Output is correct
19 Correct 12 ms 7620 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 5496 KB Output is correct
2 Correct 5 ms 5500 KB Output is correct
3 Correct 5 ms 5544 KB Output is correct
4 Correct 5 ms 5684 KB Output is correct
5 Correct 8 ms 6240 KB Output is correct
6 Correct 8 ms 6240 KB Output is correct
7 Correct 8 ms 6240 KB Output is correct
8 Correct 13 ms 7620 KB Output is correct
9 Correct 12 ms 7620 KB Output is correct
10 Correct 14 ms 7620 KB Output is correct
11 Correct 12 ms 7620 KB Output is correct
12 Correct 11 ms 7620 KB Output is correct
13 Correct 13 ms 7620 KB Output is correct
14 Correct 11 ms 7620 KB Output is correct
15 Correct 10 ms 7620 KB Output is correct
16 Correct 12 ms 7620 KB Output is correct
17 Correct 12 ms 7620 KB Output is correct
18 Correct 10 ms 7620 KB Output is correct
19 Correct 12 ms 7620 KB Output is correct
20 Correct 522 ms 8876 KB Output is correct
21 Correct 482 ms 8876 KB Output is correct
22 Correct 504 ms 8876 KB Output is correct
23 Correct 516 ms 8876 KB Output is correct
24 Correct 836 ms 171336 KB Output is correct
25 Correct 875 ms 171336 KB Output is correct
26 Correct 883 ms 171336 KB Output is correct
27 Correct 716 ms 213712 KB Output is correct
28 Correct 786 ms 214120 KB Output is correct
29 Correct 804 ms 214792 KB Output is correct
30 Correct 774 ms 214792 KB Output is correct
31 Correct 919 ms 224508 KB Output is correct
32 Correct 815 ms 224508 KB Output is correct
33 Correct 661 ms 224508 KB Output is correct
34 Correct 692 ms 224508 KB Output is correct
35 Correct 648 ms 224508 KB Output is correct
36 Correct 738 ms 224508 KB Output is correct
37 Correct 783 ms 224508 KB Output is correct
38 Correct 748 ms 224508 KB Output is correct

Subtask #3
86.0 / 86.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 5496 KB Output is correct
2 Correct 5 ms 5500 KB Output is correct
3 Correct 5 ms 5544 KB Output is correct
4 Correct 5 ms 5684 KB Output is correct
5 Correct 8 ms 6240 KB Output is correct
6 Correct 8 ms 6240 KB Output is correct
7 Correct 8 ms 6240 KB Output is correct
8 Correct 13 ms 7620 KB Output is correct
9 Correct 12 ms 7620 KB Output is correct
10 Correct 14 ms 7620 KB Output is correct
11 Correct 12 ms 7620 KB Output is correct
12 Correct 11 ms 7620 KB Output is correct
13 Correct 13 ms 7620 KB Output is correct
14 Correct 11 ms 7620 KB Output is correct
15 Correct 10 ms 7620 KB Output is correct
16 Correct 12 ms 7620 KB Output is correct
17 Correct 12 ms 7620 KB Output is correct
18 Correct 10 ms 7620 KB Output is correct
19 Correct 12 ms 7620 KB Output is correct
20 Correct 522 ms 8876 KB Output is correct
21 Correct 482 ms 8876 KB Output is correct
22 Correct 504 ms 8876 KB Output is correct
23 Correct 516 ms 8876 KB Output is correct
24 Correct 836 ms 171336 KB Output is correct
25 Correct 875 ms 171336 KB Output is correct
26 Correct 883 ms 171336 KB Output is correct
27 Correct 716 ms 213712 KB Output is correct
28 Correct 786 ms 214120 KB Output is correct
29 Correct 804 ms 214792 KB Output is correct
30 Correct 774 ms 214792 KB Output is correct
31 Correct 919 ms 224508 KB Output is correct
32 Correct 815 ms 224508 KB Output is correct
33 Correct 661 ms 224508 KB Output is correct
34 Correct 692 ms 224508 KB Output is correct
35 Correct 648 ms 224508 KB Output is correct
36 Correct 738 ms 224508 KB Output is correct
37 Correct 783 ms 224508 KB Output is correct
38 Correct 748 ms 224508 KB Output is correct
39 Correct 1065 ms 224508 KB Output is correct
40 Correct 913 ms 224508 KB Output is correct
41 Correct 912 ms 224508 KB Output is correct
42 Correct 923 ms 224508 KB Output is correct
43 Correct 938 ms 224508 KB Output is correct
44 Correct 576 ms 224508 KB Output is correct
45 Correct 521 ms 224508 KB Output is correct
46 Correct 517 ms 224508 KB Output is correct
47 Correct 540 ms 224508 KB Output is correct
48 Correct 529 ms 224508 KB Output is correct
49 Correct 997 ms 224508 KB Output is correct
50 Correct 840 ms 224508 KB Output is correct
51 Correct 554 ms 224508 KB Output is correct
52 Correct 497 ms 224508 KB Output is correct
53 Correct 908 ms 224508 KB Output is correct
54 Correct 1020 ms 224508 KB Output is correct
55 Correct 763 ms 224508 KB Output is correct
56 Correct 968 ms 224508 KB Output is correct
57 Correct 561 ms 224508 KB Output is correct
58 Correct 766 ms 224508 KB Output is correct
59 Correct 511 ms 224508 KB Output is correct
60 Correct 497 ms 224508 KB Output is correct
61 Correct 1056 ms 241636 KB Output is correct
62 Correct 1126 ms 241636 KB Output is correct
63 Correct 833 ms 241636 KB Output is correct
64 Correct 1451 ms 249536 KB Output is correct
65 Correct 1181 ms 249536 KB Output is correct
66 Correct 1002 ms 249536 KB Output is correct
67 Correct 1426 ms 257544 KB Output is correct
68 Correct 1115 ms 257544 KB Output is correct
69 Correct 972 ms 257544 KB Output is correct
70 Correct 821 ms 265280 KB Output is correct
71 Correct 818 ms 265280 KB Output is correct
72 Correct 836 ms 265280 KB Output is correct
73 Correct 887 ms 273620 KB Output is correct
74 Correct 874 ms 273620 KB Output is correct
75 Correct 910 ms 273620 KB Output is correct
76 Correct 1088 ms 279796 KB Output is correct
77 Correct 926 ms 285404 KB Output is correct
78 Correct 820 ms 288396 KB Output is correct
79 Correct 564 ms 288396 KB Output is correct
80 Correct 503 ms 288396 KB Output is correct
81 Correct 495 ms 288396 KB Output is correct
82 Correct 970 ms 294660 KB Output is correct
83 Correct 1030 ms 312176 KB Output is correct
84 Correct 875 ms 312176 KB Output is correct
85 Correct 966 ms 319436 KB Output is correct
86 Correct 759 ms 319436 KB Output is correct
87 Correct 848 ms 329268 KB Output is correct
88 Correct 567 ms 329268 KB Output is correct
89 Correct 554 ms 329268 KB Output is correct
90 Correct 533 ms 329268 KB Output is correct
91 Correct 513 ms 329268 KB Output is correct
92 Correct 498 ms 329268 KB Output is correct
93 Correct 504 ms 329268 KB Output is correct
94 Correct 873 ms 329268 KB Output is correct
95 Correct 875 ms 329268 KB Output is correct
96 Correct 803 ms 329268 KB Output is correct
97 Correct 792 ms 329268 KB Output is correct
98 Correct 696 ms 329268 KB Output is correct
99 Correct 706 ms 329268 KB Output is correct
100 Correct 598 ms 329268 KB Output is correct
101 Correct 575 ms 329268 KB Output is correct
102 Correct 534 ms 329268 KB Output is correct
103 Correct 546 ms 329268 KB Output is correct
104 Correct 521 ms 329268 KB Output is correct
105 Correct 520 ms 329268 KB Output is correct
106 Correct 954 ms 329268 KB Output is correct
107 Correct 966 ms 329268 KB Output is correct
108 Correct 865 ms 329268 KB Output is correct
109 Correct 919 ms 337772 KB Output is correct
110 Correct 689 ms 337772 KB Output is correct
111 Correct 733 ms 337772 KB Output is correct
112 Correct 555 ms 337772 KB Output is correct
113 Correct 573 ms 337772 KB Output is correct
114 Correct 526 ms 337772 KB Output is correct
115 Correct 523 ms 337772 KB Output is correct
116 Correct 512 ms 337772 KB Output is correct
117 Correct 528 ms 337772 KB Output is correct
118 Correct 882 ms 385180 KB Output is correct
119 Correct 831 ms 385180 KB Output is correct
120 Correct 882 ms 385180 KB Output is correct
121 Correct 879 ms 393044 KB Output is correct
122 Correct 846 ms 393044 KB Output is correct
123 Correct 864 ms 393044 KB Output is correct
124 Correct 831 ms 400676 KB Output is correct
125 Correct 821 ms 400676 KB Output is correct
126 Correct 867 ms 400676 KB Output is correct