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Submission #269449

# Submission time Handle Problem Language Result Execution time Memory
269449 2020-08-17T07:09:16 Z 임성재(#5102) Making Friends on Joitter is Fun (JOI20_joitter2) C++17
17 / 100
 5000 ms 58400 KB 
#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;

	//cout << a << "!!! " << b << "\n";

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

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

		out[a].insert(Find(i));
		if(out[Find(i)].find(a) != out[Find(i)].end()) {
			q.eb(a, Find(i));
		}
		//cout << a << ":: " << Find(i) << "\n";
	}

	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));
		}
	}

	vector<int> v;

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

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

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));

		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);
		}

		ans = 0;
		for(int j=1; j<=n; j++) {
			if(j != Find(j)) continue;

			//cout << j << " " << sz[j] << " " << in[j].size() << "\n";

			ans += sz[j] * (sz[j] - 1);
			ans += sz[j] * (ll) in[j].size();
		}

		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 7 ms 9728 KB Output is correct
3 Correct 7 ms 9760 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 7 ms 9856 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 7 ms 9728 KB Output is correct
12 Correct 7 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 7 ms 9728 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 7 ms 9856 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 7 ms 9856 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 8 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 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 7 ms 9728 KB Output is correct
31 Correct 9 ms 9728 KB Output is correct
32 Correct 7 ms 9728 KB Output is correct
33 Correct 7 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 7 ms 9728 KB Output is correct
3 Correct 7 ms 9760 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 7 ms 9856 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 7 ms 9728 KB Output is correct
12 Correct 7 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 7 ms 9728 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 7 ms 9856 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 7 ms 9856 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 8 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 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 7 ms 9728 KB Output is correct
31 Correct 9 ms 9728 KB Output is correct
32 Correct 7 ms 9728 KB Output is correct
33 Correct 7 ms 9728 KB Output is correct
34 Correct 9 ms 9856 KB Output is correct
35 Correct 124 ms 14336 KB Output is correct
36 Correct 272 ms 16312 KB Output is correct
37 Correct 276 ms 16244 KB Output is correct
38 Correct 271 ms 16048 KB Output is correct
39 Correct 61 ms 10104 KB Output is correct
40 Correct 40 ms 10232 KB Output is correct
41 Correct 40 ms 10232 KB Output is correct
42 Correct 59 ms 10108 KB Output is correct
43 Correct 476 ms 58400 KB Output is correct
44 Correct 503 ms 56836 KB Output is correct
45 Correct 57 ms 10092 KB Output is correct
46 Correct 59 ms 10104 KB Output is correct
47 Correct 59 ms 11384 KB Output is correct
48 Correct 51 ms 11640 KB Output is correct
49 Correct 69 ms 11104 KB Output is correct
50 Correct 292 ms 16440 KB Output is correct
51 Correct 281 ms 37324 KB Output is correct
52 Correct 213 ms 15180 KB Output is correct
53 Correct 63 ms 11360 KB Output is correct
54 Correct 236 ms 15736 KB Output is correct
55 Correct 41 ms 10360 KB Output is correct
56 Correct 41 ms 10360 KB Output is correct
57 Correct 39 ms 10360 KB Output is correct
58 Correct 43 ms 10412 KB Output is correct
59 Correct 42 ms 10108 KB Output is correct
60 Correct 139 ms 13816 KB Output is correct
61 Correct 83 ms 15352 KB Output is correct
62 Correct 257 ms 15912 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 7 ms 9728 KB Output is correct
3 Correct 7 ms 9760 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 8 ms 9728 KB Output is correct
8 Correct 7 ms 9856 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 7 ms 9728 KB Output is correct
12 Correct 7 ms 9728 KB Output is correct
13 Correct 7 ms 9728 KB Output is correct
14 Correct 7 ms 9728 KB Output is correct
15 Correct 7 ms 9728 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 7 ms 9856 KB Output is correct
22 Correct 7 ms 9728 KB Output is correct
23 Correct 7 ms 9856 KB Output is correct
24 Correct 7 ms 9728 KB Output is correct
25 Correct 8 ms 9728 KB Output is correct
26 Correct 7 ms 9728 KB Output is correct
27 Correct 7 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 7 ms 9728 KB Output is correct
31 Correct 9 ms 9728 KB Output is correct
32 Correct 7 ms 9728 KB Output is correct
33 Correct 7 ms 9728 KB Output is correct
34 Correct 9 ms 9856 KB Output is correct
35 Correct 124 ms 14336 KB Output is correct
36 Correct 272 ms 16312 KB Output is correct
37 Correct 276 ms 16244 KB Output is correct
38 Correct 271 ms 16048 KB Output is correct
39 Correct 61 ms 10104 KB Output is correct
40 Correct 40 ms 10232 KB Output is correct
41 Correct 40 ms 10232 KB Output is correct
42 Correct 59 ms 10108 KB Output is correct
43 Correct 476 ms 58400 KB Output is correct
44 Correct 503 ms 56836 KB Output is correct
45 Correct 57 ms 10092 KB Output is correct
46 Correct 59 ms 10104 KB Output is correct
47 Correct 59 ms 11384 KB Output is correct
48 Correct 51 ms 11640 KB Output is correct
49 Correct 69 ms 11104 KB Output is correct
50 Correct 292 ms 16440 KB Output is correct
51 Correct 281 ms 37324 KB Output is correct
52 Correct 213 ms 15180 KB Output is correct
53 Correct 63 ms 11360 KB Output is correct
54 Correct 236 ms 15736 KB Output is correct
55 Correct 41 ms 10360 KB Output is correct
56 Correct 41 ms 10360 KB Output is correct
57 Correct 39 ms 10360 KB Output is correct
58 Correct 43 ms 10412 KB Output is correct
59 Correct 42 ms 10108 KB Output is correct
60 Correct 139 ms 13816 KB Output is correct
61 Correct 83 ms 15352 KB Output is correct
62 Correct 257 ms 15912 KB Output is correct
63 Execution timed out 5076 ms 12772 KB Time limit exceeded
64 Halted 0 ms 0 KB -