답안 #388091

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
388091	2021-04-10T05:22:18 Z	pure_mem	조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2)	C++14	100 / 100	1510 ms	69108 KB

joitter2

#include <bits/stdc++.h> 
 
#define X first
#define Y second
#define MP make_pair
#define ll long long
 
using namespace std;
 
const int MAXN = 1e5 + 12;
            
int n, m, dsu[MAXN];
set< int > children[MAXN], graph[MAXN], rgraph[MAXN];
queue< pair<int, int> > to_merge;
ll answer, sz[MAXN];

void merge(int a, int b){
	graph[a].insert(b);
	rgraph[b].insert(a);
	if(graph[b].count(a))
		to_merge.push(MP(a, b));
}

int get_pr(int v){
	if(dsu[v] == v)
		return v;
	return dsu[v] = get_pr(dsu[v]);
}

int dsu_size(int a){
	return children[a].size() + graph[a].size() + rgraph[a].size();
}

void dsu_merge(int a, int b){
	if(a == b)
		return;
	if(dsu_size(a) < dsu_size(b))
		swap(a, b);
	answer += sz[b] * children[a].size() + sz[a] * children[b].size();
	dsu[b] = a, sz[a] += sz[b];
	for(int i: children[b]){
		if(children[a].count(i)) 
			answer -= sz[a];
		else
			children[a].insert(i);
	}
	graph[a].erase(b), rgraph[a].erase(b);
	graph[b].erase(a), rgraph[b].erase(a);
	for(int i: graph[b]){
		rgraph[i].erase(b);
		merge(a, i);
	}
	for(int i: rgraph[b]){
		graph[i].erase(b);
		merge(i, a);
	}
}

int main () {
	ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	cin >> n >> m;
	for(int i = 1;i <= n;i++)
		sz[i] = 1, dsu[i] = i, children[i].insert(i);
	for(int a, b;m--;){
		cin >> a >> b;
		b = get_pr(b);
		if(get_pr(a) != b && !children[b].count(a)){
			children[b].insert(a);
			answer += sz[b];
			a = get_pr(a);
			merge(a, b);
			while(!to_merge.empty()){
				tie(a, b) = to_merge.front();
				to_merge.pop();
				dsu_merge(get_pr(a), get_pr(b));
			}	
		}
		cout << answer << "\n";	
	}
}

Subtask #1
1.0 / 1.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	14412 KB	Output is correct
2	Correct	8 ms	14412 KB	Output is correct
3	Correct	8 ms	14344 KB	Output is correct
4	Correct	8 ms	14320 KB	Output is correct
5	Correct	8 ms	14412 KB	Output is correct
6	Correct	8 ms	14340 KB	Output is correct
7	Correct	9 ms	14412 KB	Output is correct
8	Correct	9 ms	14436 KB	Output is correct
9	Correct	9 ms	14392 KB	Output is correct
10	Correct	8 ms	14412 KB	Output is correct
11	Correct	8 ms	14404 KB	Output is correct
12	Correct	9 ms	14340 KB	Output is correct
13	Correct	9 ms	14544 KB	Output is correct
14	Correct	9 ms	14412 KB	Output is correct
15	Correct	8 ms	14412 KB	Output is correct
16	Correct	11 ms	14412 KB	Output is correct
17	Correct	9 ms	14412 KB	Output is correct
18	Correct	9 ms	14420 KB	Output is correct
19	Correct	10 ms	14432 KB	Output is correct
20	Correct	9 ms	14412 KB	Output is correct
21	Correct	9 ms	14412 KB	Output is correct
22	Correct	9 ms	14400 KB	Output is correct
23	Correct	9 ms	14412 KB	Output is correct
24	Correct	9 ms	14452 KB	Output is correct
25	Correct	9 ms	14356 KB	Output is correct
26	Correct	9 ms	14412 KB	Output is correct
27	Correct	9 ms	14436 KB	Output is correct
28	Correct	9 ms	14404 KB	Output is correct
29	Correct	9 ms	14436 KB	Output is correct
30	Correct	9 ms	14412 KB	Output is correct
31	Correct	9 ms	14412 KB	Output is correct
32	Correct	9 ms	14412 KB	Output is correct
33	Correct	9 ms	14396 KB	Output is correct

Subtask #2
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	14412 KB	Output is correct
2	Correct	8 ms	14412 KB	Output is correct
3	Correct	8 ms	14344 KB	Output is correct
4	Correct	8 ms	14320 KB	Output is correct
5	Correct	8 ms	14412 KB	Output is correct
6	Correct	8 ms	14340 KB	Output is correct
7	Correct	9 ms	14412 KB	Output is correct
8	Correct	9 ms	14436 KB	Output is correct
9	Correct	9 ms	14392 KB	Output is correct
10	Correct	8 ms	14412 KB	Output is correct
11	Correct	8 ms	14404 KB	Output is correct
12	Correct	9 ms	14340 KB	Output is correct
13	Correct	9 ms	14544 KB	Output is correct
14	Correct	9 ms	14412 KB	Output is correct
15	Correct	8 ms	14412 KB	Output is correct
16	Correct	11 ms	14412 KB	Output is correct
17	Correct	9 ms	14412 KB	Output is correct
18	Correct	9 ms	14420 KB	Output is correct
19	Correct	10 ms	14432 KB	Output is correct
20	Correct	9 ms	14412 KB	Output is correct
21	Correct	9 ms	14412 KB	Output is correct
22	Correct	9 ms	14400 KB	Output is correct
23	Correct	9 ms	14412 KB	Output is correct
24	Correct	9 ms	14452 KB	Output is correct
25	Correct	9 ms	14356 KB	Output is correct
26	Correct	9 ms	14412 KB	Output is correct
27	Correct	9 ms	14436 KB	Output is correct
28	Correct	9 ms	14404 KB	Output is correct
29	Correct	9 ms	14436 KB	Output is correct
30	Correct	9 ms	14412 KB	Output is correct
31	Correct	9 ms	14412 KB	Output is correct
32	Correct	9 ms	14412 KB	Output is correct
33	Correct	9 ms	14396 KB	Output is correct
34	Correct	11 ms	14568 KB	Output is correct
35	Correct	104 ms	20280 KB	Output is correct
36	Correct	130 ms	22980 KB	Output is correct
37	Correct	133 ms	23072 KB	Output is correct
38	Correct	127 ms	22720 KB	Output is correct
39	Correct	12 ms	14796 KB	Output is correct
40	Correct	17 ms	15080 KB	Output is correct
41	Correct	16 ms	15052 KB	Output is correct
42	Correct	12 ms	14760 KB	Output is correct
43	Correct	13 ms	14820 KB	Output is correct
44	Correct	13 ms	14812 KB	Output is correct
45	Correct	12 ms	14800 KB	Output is correct
46	Correct	12 ms	14680 KB	Output is correct
47	Correct	13 ms	14952 KB	Output is correct
48	Correct	13 ms	14976 KB	Output is correct
49	Correct	22 ms	15644 KB	Output is correct
50	Correct	141 ms	23236 KB	Output is correct
51	Correct	17 ms	15068 KB	Output is correct
52	Correct	115 ms	21436 KB	Output is correct
53	Correct	20 ms	15528 KB	Output is correct
54	Correct	124 ms	22408 KB	Output is correct
55	Correct	15 ms	15200 KB	Output is correct
56	Correct	15 ms	15180 KB	Output is correct
57	Correct	19 ms	15180 KB	Output is correct
58	Correct	15 ms	15180 KB	Output is correct
59	Correct	13 ms	15180 KB	Output is correct
60	Correct	98 ms	20164 KB	Output is correct
61	Correct	14 ms	14924 KB	Output is correct
62	Correct	127 ms	22620 KB	Output is correct

Subtask #3
83.0 / 83.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	14412 KB	Output is correct
2	Correct	8 ms	14412 KB	Output is correct
3	Correct	8 ms	14344 KB	Output is correct
4	Correct	8 ms	14320 KB	Output is correct
5	Correct	8 ms	14412 KB	Output is correct
6	Correct	8 ms	14340 KB	Output is correct
7	Correct	9 ms	14412 KB	Output is correct
8	Correct	9 ms	14436 KB	Output is correct
9	Correct	9 ms	14392 KB	Output is correct
10	Correct	8 ms	14412 KB	Output is correct
11	Correct	8 ms	14404 KB	Output is correct
12	Correct	9 ms	14340 KB	Output is correct
13	Correct	9 ms	14544 KB	Output is correct
14	Correct	9 ms	14412 KB	Output is correct
15	Correct	8 ms	14412 KB	Output is correct
16	Correct	11 ms	14412 KB	Output is correct
17	Correct	9 ms	14412 KB	Output is correct
18	Correct	9 ms	14420 KB	Output is correct
19	Correct	10 ms	14432 KB	Output is correct
20	Correct	9 ms	14412 KB	Output is correct
21	Correct	9 ms	14412 KB	Output is correct
22	Correct	9 ms	14400 KB	Output is correct
23	Correct	9 ms	14412 KB	Output is correct
24	Correct	9 ms	14452 KB	Output is correct
25	Correct	9 ms	14356 KB	Output is correct
26	Correct	9 ms	14412 KB	Output is correct
27	Correct	9 ms	14436 KB	Output is correct
28	Correct	9 ms	14404 KB	Output is correct
29	Correct	9 ms	14436 KB	Output is correct
30	Correct	9 ms	14412 KB	Output is correct
31	Correct	9 ms	14412 KB	Output is correct
32	Correct	9 ms	14412 KB	Output is correct
33	Correct	9 ms	14396 KB	Output is correct
34	Correct	11 ms	14568 KB	Output is correct
35	Correct	104 ms	20280 KB	Output is correct
36	Correct	130 ms	22980 KB	Output is correct
37	Correct	133 ms	23072 KB	Output is correct
38	Correct	127 ms	22720 KB	Output is correct
39	Correct	12 ms	14796 KB	Output is correct
40	Correct	17 ms	15080 KB	Output is correct
41	Correct	16 ms	15052 KB	Output is correct
42	Correct	12 ms	14760 KB	Output is correct
43	Correct	13 ms	14820 KB	Output is correct
44	Correct	13 ms	14812 KB	Output is correct
45	Correct	12 ms	14800 KB	Output is correct
46	Correct	12 ms	14680 KB	Output is correct
47	Correct	13 ms	14952 KB	Output is correct
48	Correct	13 ms	14976 KB	Output is correct
49	Correct	22 ms	15644 KB	Output is correct
50	Correct	141 ms	23236 KB	Output is correct
51	Correct	17 ms	15068 KB	Output is correct
52	Correct	115 ms	21436 KB	Output is correct
53	Correct	20 ms	15528 KB	Output is correct
54	Correct	124 ms	22408 KB	Output is correct
55	Correct	15 ms	15200 KB	Output is correct
56	Correct	15 ms	15180 KB	Output is correct
57	Correct	19 ms	15180 KB	Output is correct
58	Correct	15 ms	15180 KB	Output is correct
59	Correct	13 ms	15180 KB	Output is correct
60	Correct	98 ms	20164 KB	Output is correct
61	Correct	14 ms	14924 KB	Output is correct
62	Correct	127 ms	22620 KB	Output is correct
63	Correct	805 ms	67992 KB	Output is correct
64	Correct	804 ms	67992 KB	Output is correct
65	Correct	834 ms	67996 KB	Output is correct
66	Correct	341 ms	33988 KB	Output is correct
67	Correct	639 ms	60996 KB	Output is correct
68	Correct	321 ms	34060 KB	Output is correct
69	Correct	602 ms	35156 KB	Output is correct
70	Correct	326 ms	34036 KB	Output is correct
71	Correct	346 ms	33972 KB	Output is correct
72	Correct	662 ms	45124 KB	Output is correct
73	Correct	694 ms	46632 KB	Output is correct
74	Correct	1510 ms	68552 KB	Output is correct
75	Correct	857 ms	41924 KB	Output is correct
76	Correct	1122 ms	54100 KB	Output is correct
77	Correct	1126 ms	54212 KB	Output is correct
78	Correct	358 ms	37572 KB	Output is correct
79	Correct	627 ms	42116 KB	Output is correct
80	Correct	339 ms	36416 KB	Output is correct
81	Correct	538 ms	40132 KB	Output is correct
82	Correct	1243 ms	54724 KB	Output is correct
83	Correct	1288 ms	54608 KB	Output is correct
84	Correct	938 ms	53316 KB	Output is correct
85	Correct	937 ms	53348 KB	Output is correct
86	Correct	491 ms	66836 KB	Output is correct
87	Correct	540 ms	69108 KB	Output is correct
88	Correct	673 ms	45888 KB	Output is correct
89	Correct	1088 ms	51880 KB	Output is correct

답안 #388091

Compilation message

Subtask #1 1.0 / 1.0

Subtask #2 16.0 / 16.0

Subtask #3 83.0 / 83.0

Subtask #1
1.0 / 1.0

Subtask #2
16.0 / 16.0

Subtask #3
83.0 / 83.0