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답안 #927750

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
927750 2024-02-15T09:51:11 Z vjudge1 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++17
100 / 100
 856 ms 69452 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define N 100005
#define fi first
#define se second

typedef pair<int, int> ii;

set<int> adj[N], radj[N], st[N];
int pr[N], siz[N], n, m, res = 0;
queue<ii> q;

int find(int u){
	if (u == pr[u]) return u;
	return pr[u] = find(pr[u]);
}

void bl(int a, int b){
	adj[a].insert(b);
	radj[b].insert(a);
	if (adj[b].count(a)){
		q.push({a, b});
	}
}

int getsiz(int a){
	return st[a].size() + adj[a].size() + radj[a].size();
}

void unin(int a, int b){
	if (a == b) return;
	res += siz[a] * st[b].size() + siz[b] * st[a].size();
	if (getsiz(a) < getsiz(b)) swap(a, b);
	pr[b] = a;
	siz[a] += siz[b];
	for (auto x : st[b]){
		if (st[a].count(x)) res -= siz[a];
		else st[a].insert(x);
	}
	adj[a].erase(b);
	radj[a].erase(b);
	adj[b].erase(a);
	radj[b].erase(a);
	for (auto x : adj[b]){
		radj[x].erase(b);
		bl(a, x);
	}
	for (auto x : radj[b]){
		adj[x].erase(b);
		bl(x, a);
	}
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
        
    cin >> n >> m;
    for (int i = 1; i <= n; i++){
    	siz[i] = 1;
    	pr[i] = i;
    	st[i].insert(i);
    }

    while (m--){
    	int a, b;
    	cin >> a >> b;
    	b = find(b);
    	if (find(a) != b && !st[b].count(a)){
    		st[b].insert(a);
    		res += siz[b];
    	 	a = find(a);
    	 	bl(a, b);
    	 	while (!q.empty()){
    	 		a = q.front().fi;
    	 		b = q.front().se;
    	 		q.pop();
    	 		unin(find(a), find(b));
    	 	}
    	}	
    	cout << res << "\n";
    }

    return 0;
}

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 15712 KB Output is correct
2 Correct 4 ms 15708 KB Output is correct
3 Correct 4 ms 15708 KB Output is correct
4 Correct 4 ms 15908 KB Output is correct
5 Correct 4 ms 15704 KB Output is correct
6 Correct 4 ms 15704 KB Output is correct
7 Correct 4 ms 15964 KB Output is correct
8 Correct 4 ms 15964 KB Output is correct
9 Correct 5 ms 15900 KB Output is correct
10 Correct 3 ms 15708 KB Output is correct
11 Correct 3 ms 15708 KB Output is correct
12 Correct 4 ms 15708 KB Output is correct
13 Correct 4 ms 15708 KB Output is correct
14 Correct 4 ms 15708 KB Output is correct
15 Correct 4 ms 15704 KB Output is correct
16 Correct 4 ms 15944 KB Output is correct
17 Correct 4 ms 15708 KB Output is correct
18 Correct 4 ms 15964 KB Output is correct
19 Correct 4 ms 15708 KB Output is correct
20 Correct 5 ms 15964 KB Output is correct
21 Correct 5 ms 15796 KB Output is correct
22 Correct 4 ms 15960 KB Output is correct
23 Correct 4 ms 15988 KB Output is correct
24 Correct 4 ms 15960 KB Output is correct
25 Correct 6 ms 15964 KB Output is correct
26 Correct 5 ms 15964 KB Output is correct
27 Correct 4 ms 15964 KB Output is correct
28 Correct 5 ms 15960 KB Output is correct
29 Correct 4 ms 15704 KB Output is correct
30 Correct 4 ms 15704 KB Output is correct
31 Correct 5 ms 15964 KB Output is correct
32 Correct 4 ms 15708 KB Output is correct
33 Correct 4 ms 16216 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 15712 KB Output is correct
2 Correct 4 ms 15708 KB Output is correct
3 Correct 4 ms 15708 KB Output is correct
4 Correct 4 ms 15908 KB Output is correct
5 Correct 4 ms 15704 KB Output is correct
6 Correct 4 ms 15704 KB Output is correct
7 Correct 4 ms 15964 KB Output is correct
8 Correct 4 ms 15964 KB Output is correct
9 Correct 5 ms 15900 KB Output is correct
10 Correct 3 ms 15708 KB Output is correct
11 Correct 3 ms 15708 KB Output is correct
12 Correct 4 ms 15708 KB Output is correct
13 Correct 4 ms 15708 KB Output is correct
14 Correct 4 ms 15708 KB Output is correct
15 Correct 4 ms 15704 KB Output is correct
16 Correct 4 ms 15944 KB Output is correct
17 Correct 4 ms 15708 KB Output is correct
18 Correct 4 ms 15964 KB Output is correct
19 Correct 4 ms 15708 KB Output is correct
20 Correct 5 ms 15964 KB Output is correct
21 Correct 5 ms 15796 KB Output is correct
22 Correct 4 ms 15960 KB Output is correct
23 Correct 4 ms 15988 KB Output is correct
24 Correct 4 ms 15960 KB Output is correct
25 Correct 6 ms 15964 KB Output is correct
26 Correct 5 ms 15964 KB Output is correct
27 Correct 4 ms 15964 KB Output is correct
28 Correct 5 ms 15960 KB Output is correct
29 Correct 4 ms 15704 KB Output is correct
30 Correct 4 ms 15704 KB Output is correct
31 Correct 5 ms 15964 KB Output is correct
32 Correct 4 ms 15708 KB Output is correct
33 Correct 4 ms 16216 KB Output is correct
34 Correct 7 ms 15960 KB Output is correct
35 Correct 65 ms 21844 KB Output is correct
36 Correct 88 ms 24716 KB Output is correct
37 Correct 109 ms 24800 KB Output is correct
38 Correct 82 ms 24400 KB Output is correct
39 Correct 6 ms 16220 KB Output is correct
40 Correct 9 ms 16548 KB Output is correct
41 Correct 7 ms 16476 KB Output is correct
42 Correct 6 ms 16216 KB Output is correct
43 Correct 6 ms 16220 KB Output is correct
44 Correct 10 ms 16220 KB Output is correct
45 Correct 8 ms 16220 KB Output is correct
46 Correct 6 ms 16220 KB Output is correct
47 Correct 7 ms 16472 KB Output is correct
48 Correct 8 ms 16476 KB Output is correct
49 Correct 12 ms 17192 KB Output is correct
50 Correct 85 ms 24912 KB Output is correct
51 Correct 11 ms 16472 KB Output is correct
52 Correct 75 ms 22852 KB Output is correct
53 Correct 11 ms 16984 KB Output is correct
54 Correct 77 ms 23864 KB Output is correct
55 Correct 8 ms 16732 KB Output is correct
56 Correct 11 ms 16732 KB Output is correct
57 Correct 7 ms 16476 KB Output is correct
58 Correct 9 ms 16476 KB Output is correct
59 Correct 7 ms 16732 KB Output is correct
60 Correct 61 ms 21440 KB Output is correct
61 Correct 10 ms 16476 KB Output is correct
62 Correct 80 ms 24260 KB Output is correct

Subtask #3
83.0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 15712 KB Output is correct
2 Correct 4 ms 15708 KB Output is correct
3 Correct 4 ms 15708 KB Output is correct
4 Correct 4 ms 15908 KB Output is correct
5 Correct 4 ms 15704 KB Output is correct
6 Correct 4 ms 15704 KB Output is correct
7 Correct 4 ms 15964 KB Output is correct
8 Correct 4 ms 15964 KB Output is correct
9 Correct 5 ms 15900 KB Output is correct
10 Correct 3 ms 15708 KB Output is correct
11 Correct 3 ms 15708 KB Output is correct
12 Correct 4 ms 15708 KB Output is correct
13 Correct 4 ms 15708 KB Output is correct
14 Correct 4 ms 15708 KB Output is correct
15 Correct 4 ms 15704 KB Output is correct
16 Correct 4 ms 15944 KB Output is correct
17 Correct 4 ms 15708 KB Output is correct
18 Correct 4 ms 15964 KB Output is correct
19 Correct 4 ms 15708 KB Output is correct
20 Correct 5 ms 15964 KB Output is correct
21 Correct 5 ms 15796 KB Output is correct
22 Correct 4 ms 15960 KB Output is correct
23 Correct 4 ms 15988 KB Output is correct
24 Correct 4 ms 15960 KB Output is correct
25 Correct 6 ms 15964 KB Output is correct
26 Correct 5 ms 15964 KB Output is correct
27 Correct 4 ms 15964 KB Output is correct
28 Correct 5 ms 15960 KB Output is correct
29 Correct 4 ms 15704 KB Output is correct
30 Correct 4 ms 15704 KB Output is correct
31 Correct 5 ms 15964 KB Output is correct
32 Correct 4 ms 15708 KB Output is correct
33 Correct 4 ms 16216 KB Output is correct
34 Correct 7 ms 15960 KB Output is correct
35 Correct 65 ms 21844 KB Output is correct
36 Correct 88 ms 24716 KB Output is correct
37 Correct 109 ms 24800 KB Output is correct
38 Correct 82 ms 24400 KB Output is correct
39 Correct 6 ms 16220 KB Output is correct
40 Correct 9 ms 16548 KB Output is correct
41 Correct 7 ms 16476 KB Output is correct
42 Correct 6 ms 16216 KB Output is correct
43 Correct 6 ms 16220 KB Output is correct
44 Correct 10 ms 16220 KB Output is correct
45 Correct 8 ms 16220 KB Output is correct
46 Correct 6 ms 16220 KB Output is correct
47 Correct 7 ms 16472 KB Output is correct
48 Correct 8 ms 16476 KB Output is correct
49 Correct 12 ms 17192 KB Output is correct
50 Correct 85 ms 24912 KB Output is correct
51 Correct 11 ms 16472 KB Output is correct
52 Correct 75 ms 22852 KB Output is correct
53 Correct 11 ms 16984 KB Output is correct
54 Correct 77 ms 23864 KB Output is correct
55 Correct 8 ms 16732 KB Output is correct
56 Correct 11 ms 16732 KB Output is correct
57 Correct 7 ms 16476 KB Output is correct
58 Correct 9 ms 16476 KB Output is correct
59 Correct 7 ms 16732 KB Output is correct
60 Correct 61 ms 21440 KB Output is correct
61 Correct 10 ms 16476 KB Output is correct
62 Correct 80 ms 24260 KB Output is correct
63 Correct 497 ms 68432 KB Output is correct
64 Correct 491 ms 68436 KB Output is correct
65 Correct 509 ms 68452 KB Output is correct
66 Correct 186 ms 34460 KB Output is correct
67 Correct 370 ms 61380 KB Output is correct
68 Correct 160 ms 34600 KB Output is correct
69 Correct 294 ms 35744 KB Output is correct
70 Correct 185 ms 34384 KB Output is correct
71 Correct 208 ms 34548 KB Output is correct
72 Correct 388 ms 45348 KB Output is correct
73 Correct 385 ms 47188 KB Output is correct
74 Correct 856 ms 69424 KB Output is correct
75 Correct 440 ms 42324 KB Output is correct
76 Correct 628 ms 54308 KB Output is correct
77 Correct 745 ms 54724 KB Output is correct
78 Correct 197 ms 38272 KB Output is correct
79 Correct 333 ms 42600 KB Output is correct
80 Correct 176 ms 37200 KB Output is correct
81 Correct 283 ms 40528 KB Output is correct
82 Correct 696 ms 55284 KB Output is correct
83 Correct 723 ms 55376 KB Output is correct
84 Correct 540 ms 53772 KB Output is correct
85 Correct 608 ms 53720 KB Output is correct
86 Correct 279 ms 67324 KB Output is correct
87 Correct 423 ms 69452 KB Output is correct
88 Correct 437 ms 46416 KB Output is correct
89 Correct 670 ms 52748 KB Output is correct