Submission #269751

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
269751	2020-08-17T09:35:29 Z	sjimed	Making Friends on Joitter is Fun (JOI20_joitter2)	C++14	17 / 100	5000 ms	44704 KB

joitter2

#include<bits/stdc++.h>
using namespace std;

#define fast ios::sync_with_stdio(false); cin.tie(0);
#define fi first
#define se second
#define all(v) (v).begin(), (v).end()
#define em emplace
#define eb emplace_back
#define mp make_pair

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const ll INF = 1e18;
const int inf = 1e9;
const ll Mod = 1e9 + 7;

int n, m;
int a, b;
int p[100010];
ll sz[100010];
set<int> in[100010], out[100010];
ll ans;
vector<pii> q;

int Find(int a) {
	return p[a] = a == p[a] ? a : Find(p[a]);
}

void Union(int a, int b) {
	a = Find(a);
	b = Find(b);

	if(a == b) return;

	if(sz[a] < sz[b]) swap(a, b);

	ans -= sz[a] * (sz[a]-1) + sz[b] * (sz[b] - 1);
	ans -= sz[a] * in[a].size();
	ans -= sz[b] * in[b].size();

	p[b] = a;
	sz[a] += sz[b];
	sz[b] = 0;

	ans += sz[a] * (sz[a] - 1);

	for(auto i : out[b]) {
		if(Find(i) == a || Find(i) == b) continue;

		out[a].insert(Find(i));
		
		if(out[Find(i)].find(a) != out[Find(i)].end()) {
			q.eb(a, Find(i));
		}
	}
	out[b].clear();

	for(auto i : in[b]) {
		if(Find(i) == a) continue;

		in[a].insert(i);
		out[Find(i)].insert(a);

		if(out[a].find(Find(i)) != out[a].end()) {
			q.eb(a, Find(i));
		}
	}
	in[b].clear();

	vector<int> v;

	for(auto i : in[a]) {
		if(Find(i) == a) v.eb(i);
	}

	for(auto i : v) in[a].erase(i);

	ans += sz[a] * in[a].size();
}

int main() {
	fast;

	cin >> n >> m;

	for(int i=1; i<=n; i++)
		p[i] = i, sz[i] = 1;

	for(int i=1; i<=m; i++) {
		cin >> a >> b;

		if(Find(a) == Find(b) || in[Find(b)].find(a) != in[Find(b)].end()) {
			cout << ans << "\n";
			continue;
		}

		in[Find(b)].insert(a);
		out[Find(a)].insert(Find(b));
		ans += sz[Find(b)];

		if(out[Find(b)].find(Find(a)) != out[Find(b)].end()) {
			q.eb(a, b);
		}

		while(q.size()) {
			auto x = q.back();
			q.pop_back();

			Union(x.fi, x.se);
		}

		cout << ans << "\n";
	}

}

Subtask #1
1.0 / 1.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	7 ms	9728 KB	Output is correct
2	Correct	6 ms	9728 KB	Output is correct
3	Correct	7 ms	9728 KB	Output is correct
4	Correct	6 ms	9728 KB	Output is correct
5	Correct	7 ms	9728 KB	Output is correct
6	Correct	6 ms	9728 KB	Output is correct
7	Correct	7 ms	9728 KB	Output is correct
8	Correct	7 ms	9728 KB	Output is correct
9	Correct	8 ms	9728 KB	Output is correct
10	Correct	7 ms	9728 KB	Output is correct
11	Correct	6 ms	9728 KB	Output is correct
12	Correct	7 ms	9728 KB	Output is correct
13	Correct	8 ms	9728 KB	Output is correct
14	Correct	7 ms	9728 KB	Output is correct
15	Correct	7 ms	9800 KB	Output is correct
16	Correct	7 ms	9728 KB	Output is correct
17	Correct	7 ms	9728 KB	Output is correct
18	Correct	7 ms	9728 KB	Output is correct
19	Correct	7 ms	9728 KB	Output is correct
20	Correct	7 ms	9728 KB	Output is correct
21	Correct	8 ms	9728 KB	Output is correct
22	Correct	7 ms	9728 KB	Output is correct
23	Correct	8 ms	9728 KB	Output is correct
24	Correct	7 ms	9728 KB	Output is correct
25	Correct	7 ms	9728 KB	Output is correct
26	Correct	7 ms	9728 KB	Output is correct
27	Correct	8 ms	9728 KB	Output is correct
28	Correct	7 ms	9728 KB	Output is correct
29	Correct	7 ms	9728 KB	Output is correct
30	Correct	8 ms	9728 KB	Output is correct
31	Correct	7 ms	9728 KB	Output is correct
32	Correct	7 ms	9728 KB	Output is correct
33	Correct	8 ms	9728 KB	Output is correct

Subtask #2
16.0 / 16.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	7 ms	9728 KB	Output is correct
2	Correct	6 ms	9728 KB	Output is correct
3	Correct	7 ms	9728 KB	Output is correct
4	Correct	6 ms	9728 KB	Output is correct
5	Correct	7 ms	9728 KB	Output is correct
6	Correct	6 ms	9728 KB	Output is correct
7	Correct	7 ms	9728 KB	Output is correct
8	Correct	7 ms	9728 KB	Output is correct
9	Correct	8 ms	9728 KB	Output is correct
10	Correct	7 ms	9728 KB	Output is correct
11	Correct	6 ms	9728 KB	Output is correct
12	Correct	7 ms	9728 KB	Output is correct
13	Correct	8 ms	9728 KB	Output is correct
14	Correct	7 ms	9728 KB	Output is correct
15	Correct	7 ms	9800 KB	Output is correct
16	Correct	7 ms	9728 KB	Output is correct
17	Correct	7 ms	9728 KB	Output is correct
18	Correct	7 ms	9728 KB	Output is correct
19	Correct	7 ms	9728 KB	Output is correct
20	Correct	7 ms	9728 KB	Output is correct
21	Correct	8 ms	9728 KB	Output is correct
22	Correct	7 ms	9728 KB	Output is correct
23	Correct	8 ms	9728 KB	Output is correct
24	Correct	7 ms	9728 KB	Output is correct
25	Correct	7 ms	9728 KB	Output is correct
26	Correct	7 ms	9728 KB	Output is correct
27	Correct	8 ms	9728 KB	Output is correct
28	Correct	7 ms	9728 KB	Output is correct
29	Correct	7 ms	9728 KB	Output is correct
30	Correct	8 ms	9728 KB	Output is correct
31	Correct	7 ms	9728 KB	Output is correct
32	Correct	7 ms	9728 KB	Output is correct
33	Correct	8 ms	9728 KB	Output is correct
34	Correct	11 ms	9856 KB	Output is correct
35	Correct	108 ms	15176 KB	Output is correct
36	Correct	141 ms	17276 KB	Output is correct
37	Correct	142 ms	17268 KB	Output is correct
38	Correct	135 ms	17016 KB	Output is correct
39	Correct	9 ms	9984 KB	Output is correct
40	Correct	10 ms	9984 KB	Output is correct
41	Correct	10 ms	9984 KB	Output is correct
42	Correct	9 ms	9984 KB	Output is correct
43	Correct	20 ms	9984 KB	Output is correct
44	Correct	19 ms	9984 KB	Output is correct
45	Correct	9 ms	9984 KB	Output is correct
46	Correct	10 ms	9984 KB	Output is correct
47	Correct	10 ms	9940 KB	Output is correct
48	Correct	10 ms	9984 KB	Output is correct
49	Correct	22 ms	10496 KB	Output is correct
50	Correct	143 ms	17396 KB	Output is correct
51	Correct	23 ms	10240 KB	Output is correct
52	Correct	126 ms	16120 KB	Output is correct
53	Correct	23 ms	10496 KB	Output is correct
54	Correct	131 ms	16760 KB	Output is correct
55	Correct	19 ms	10240 KB	Output is correct
56	Correct	20 ms	10240 KB	Output is correct
57	Correct	18 ms	10240 KB	Output is correct
58	Correct	18 ms	10368 KB	Output is correct
59	Correct	9 ms	9856 KB	Output is correct
60	Correct	92 ms	14840 KB	Output is correct
61	Correct	13 ms	10016 KB	Output is correct
62	Correct	135 ms	16888 KB	Output is correct

Subtask #3
0 / 83.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	7 ms	9728 KB	Output is correct
2	Correct	6 ms	9728 KB	Output is correct
3	Correct	7 ms	9728 KB	Output is correct
4	Correct	6 ms	9728 KB	Output is correct
5	Correct	7 ms	9728 KB	Output is correct
6	Correct	6 ms	9728 KB	Output is correct
7	Correct	7 ms	9728 KB	Output is correct
8	Correct	7 ms	9728 KB	Output is correct
9	Correct	8 ms	9728 KB	Output is correct
10	Correct	7 ms	9728 KB	Output is correct
11	Correct	6 ms	9728 KB	Output is correct
12	Correct	7 ms	9728 KB	Output is correct
13	Correct	8 ms	9728 KB	Output is correct
14	Correct	7 ms	9728 KB	Output is correct
15	Correct	7 ms	9800 KB	Output is correct
16	Correct	7 ms	9728 KB	Output is correct
17	Correct	7 ms	9728 KB	Output is correct
18	Correct	7 ms	9728 KB	Output is correct
19	Correct	7 ms	9728 KB	Output is correct
20	Correct	7 ms	9728 KB	Output is correct
21	Correct	8 ms	9728 KB	Output is correct
22	Correct	7 ms	9728 KB	Output is correct
23	Correct	8 ms	9728 KB	Output is correct
24	Correct	7 ms	9728 KB	Output is correct
25	Correct	7 ms	9728 KB	Output is correct
26	Correct	7 ms	9728 KB	Output is correct
27	Correct	8 ms	9728 KB	Output is correct
28	Correct	7 ms	9728 KB	Output is correct
29	Correct	7 ms	9728 KB	Output is correct
30	Correct	8 ms	9728 KB	Output is correct
31	Correct	7 ms	9728 KB	Output is correct
32	Correct	7 ms	9728 KB	Output is correct
33	Correct	8 ms	9728 KB	Output is correct
34	Correct	11 ms	9856 KB	Output is correct
35	Correct	108 ms	15176 KB	Output is correct
36	Correct	141 ms	17276 KB	Output is correct
37	Correct	142 ms	17268 KB	Output is correct
38	Correct	135 ms	17016 KB	Output is correct
39	Correct	9 ms	9984 KB	Output is correct
40	Correct	10 ms	9984 KB	Output is correct
41	Correct	10 ms	9984 KB	Output is correct
42	Correct	9 ms	9984 KB	Output is correct
43	Correct	20 ms	9984 KB	Output is correct
44	Correct	19 ms	9984 KB	Output is correct
45	Correct	9 ms	9984 KB	Output is correct
46	Correct	10 ms	9984 KB	Output is correct
47	Correct	10 ms	9940 KB	Output is correct
48	Correct	10 ms	9984 KB	Output is correct
49	Correct	22 ms	10496 KB	Output is correct
50	Correct	143 ms	17396 KB	Output is correct
51	Correct	23 ms	10240 KB	Output is correct
52	Correct	126 ms	16120 KB	Output is correct
53	Correct	23 ms	10496 KB	Output is correct
54	Correct	131 ms	16760 KB	Output is correct
55	Correct	19 ms	10240 KB	Output is correct
56	Correct	20 ms	10240 KB	Output is correct
57	Correct	18 ms	10240 KB	Output is correct
58	Correct	18 ms	10368 KB	Output is correct
59	Correct	9 ms	9856 KB	Output is correct
60	Correct	92 ms	14840 KB	Output is correct
61	Correct	13 ms	10016 KB	Output is correct
62	Correct	135 ms	16888 KB	Output is correct
63	Correct	455 ms	44664 KB	Output is correct
64	Correct	454 ms	44704 KB	Output is correct
65	Correct	495 ms	44536 KB	Output is correct
66	Correct	218 ms	20088 KB	Output is correct
67	Correct	312 ms	21128 KB	Output is correct
68	Correct	198 ms	20088 KB	Output is correct
69	Execution timed out	5048 ms	17096 KB	Time limit exceeded
70	Halted	0 ms	0 KB	-

Submission #269751

Compilation message

Subtask #1 1.0 / 1.0

Subtask #2 16.0 / 16.0

Subtask #3 0 / 83.0

Subtask #1
1.0 / 1.0

Subtask #2
16.0 / 16.0

Subtask #3
0 / 83.0