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답안 #472386

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
472386 2021-09-13T12:47:27 Z sidon 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++17
100 / 100
 1699 ms 102580 KB 
#include <bits/stdc++.h>
using namespace std;
typedef int64_t ll;
#define sz(Z) ll(size(Z))
 
const int MAX_N = 100'001;
 
int N, M;
 
int P[MAX_N];
ll in[MAX_N], S[MAX_N], edge_count;
 
set<int> g[MAX_N], h[MAX_N];
unordered_map<int, int> out[MAX_N];
 
queue<array<int, 2>> Q;
 
int find(int u){
	return P[u] == u ? u : P[u] = find(P[u]);
}
 
int main() {
	ios::sync_with_stdio(0), cin.tie(0);
 
	cin >> N >> M;
 
	for(int u = 1; u <= N; ++u)
		P[u] = u, S[u] = 1;
 
	while(M--){
		int A, B;
		cin >> A >> B;
 
		int u = find(A), v = find(B);
 
		if(u != v && h[v].find(A) == end(h[v])) {
			if(g[v].find(u) != end(g[v]))
				Q.push({u, v});
	 
			edge_count += S[v];
	 
			h[v].insert(A);
			g[u].insert(v);
			++out[u][v], ++in[v];
		}
 
		while(!empty(Q)) {
			u = find(Q.front()[0]), v = find(Q.front()[1]);
			Q.pop();
			if(u == v) continue;
 
			if(sz(g[u]) + sz(h[u]) < sz(g[v]) + sz(h[v]))
				swap(u, v);
 
			edge_count += (S[u] - out[u][v]) * S[v];
			edge_count += (S[v] - out[v][u]) * S[u];
 
			in[u] -= out[v][u];
			in[v] -= out[u][v];
 
			for(int w : g[v]) {
				g[u].insert(w);
				w = find(w);
				if(g[w].find(u) != end(g[w])) Q.push({u, w});
				out[u][w] += out[v][w];
				out[v][w] = 0;
			}
 
 			for(int w : h[v]) {
				if(find(w) != u && find(w) != v) {
					if(g[u].find(find(w)) != end(g[u])) Q.push({u, w});
					if(h[u].find(w) != end(h[u])) {
						edge_count -= S[u];
						--in[u];
					} else {
						g[find(w)].insert(u);
						++out[find(w)][u];
					}
				}

			}
 
			edge_count += in[u] * S[v] + in[v] * S[u];
 
			P[v] = u, S[u] += S[v];
			in[u] += in[v];
 
			h[u].merge(h[v]);
		}
 
		cout << edge_count << '\n';
	}
}

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 15180 KB Output is correct
2 Correct 9 ms 15180 KB Output is correct
3 Correct 9 ms 15180 KB Output is correct
4 Correct 9 ms 15180 KB Output is correct
5 Correct 9 ms 15148 KB Output is correct
6 Correct 9 ms 15180 KB Output is correct
7 Correct 10 ms 15180 KB Output is correct
8 Correct 10 ms 15180 KB Output is correct
9 Correct 10 ms 15240 KB Output is correct
10 Correct 9 ms 15180 KB Output is correct
11 Correct 11 ms 15224 KB Output is correct
12 Correct 9 ms 15180 KB Output is correct
13 Correct 10 ms 15204 KB Output is correct
14 Correct 9 ms 15204 KB Output is correct
15 Correct 9 ms 15180 KB Output is correct
16 Correct 9 ms 15204 KB Output is correct
17 Correct 10 ms 15180 KB Output is correct
18 Correct 10 ms 15180 KB Output is correct
19 Correct 9 ms 15180 KB Output is correct
20 Correct 9 ms 15180 KB Output is correct
21 Correct 10 ms 15204 KB Output is correct
22 Correct 11 ms 15180 KB Output is correct
23 Correct 10 ms 15180 KB Output is correct
24 Correct 10 ms 15180 KB Output is correct
25 Correct 11 ms 15236 KB Output is correct
26 Correct 9 ms 15200 KB Output is correct
27 Correct 9 ms 15204 KB Output is correct
28 Correct 9 ms 15180 KB Output is correct
29 Correct 10 ms 15200 KB Output is correct
30 Correct 10 ms 15224 KB Output is correct
31 Correct 10 ms 15180 KB Output is correct
32 Correct 9 ms 15196 KB Output is correct
33 Correct 10 ms 15180 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 15180 KB Output is correct
2 Correct 9 ms 15180 KB Output is correct
3 Correct 9 ms 15180 KB Output is correct
4 Correct 9 ms 15180 KB Output is correct
5 Correct 9 ms 15148 KB Output is correct
6 Correct 9 ms 15180 KB Output is correct
7 Correct 10 ms 15180 KB Output is correct
8 Correct 10 ms 15180 KB Output is correct
9 Correct 10 ms 15240 KB Output is correct
10 Correct 9 ms 15180 KB Output is correct
11 Correct 11 ms 15224 KB Output is correct
12 Correct 9 ms 15180 KB Output is correct
13 Correct 10 ms 15204 KB Output is correct
14 Correct 9 ms 15204 KB Output is correct
15 Correct 9 ms 15180 KB Output is correct
16 Correct 9 ms 15204 KB Output is correct
17 Correct 10 ms 15180 KB Output is correct
18 Correct 10 ms 15180 KB Output is correct
19 Correct 9 ms 15180 KB Output is correct
20 Correct 9 ms 15180 KB Output is correct
21 Correct 10 ms 15204 KB Output is correct
22 Correct 11 ms 15180 KB Output is correct
23 Correct 10 ms 15180 KB Output is correct
24 Correct 10 ms 15180 KB Output is correct
25 Correct 11 ms 15236 KB Output is correct
26 Correct 9 ms 15200 KB Output is correct
27 Correct 9 ms 15204 KB Output is correct
28 Correct 9 ms 15180 KB Output is correct
29 Correct 10 ms 15200 KB Output is correct
30 Correct 10 ms 15224 KB Output is correct
31 Correct 10 ms 15180 KB Output is correct
32 Correct 9 ms 15196 KB Output is correct
33 Correct 10 ms 15180 KB Output is correct
34 Correct 13 ms 15336 KB Output is correct
35 Correct 108 ms 21168 KB Output is correct
36 Correct 149 ms 24060 KB Output is correct
37 Correct 136 ms 24132 KB Output is correct
38 Correct 135 ms 23836 KB Output is correct
39 Correct 15 ms 16076 KB Output is correct
40 Correct 18 ms 16432 KB Output is correct
41 Correct 17 ms 16460 KB Output is correct
42 Correct 13 ms 15948 KB Output is correct
43 Correct 14 ms 16044 KB Output is correct
44 Correct 13 ms 15948 KB Output is correct
45 Correct 13 ms 15948 KB Output is correct
46 Correct 14 ms 15948 KB Output is correct
47 Correct 17 ms 16304 KB Output is correct
48 Correct 15 ms 16204 KB Output is correct
49 Correct 22 ms 16992 KB Output is correct
50 Correct 138 ms 24292 KB Output is correct
51 Correct 20 ms 16492 KB Output is correct
52 Correct 125 ms 22492 KB Output is correct
53 Correct 24 ms 16816 KB Output is correct
54 Correct 128 ms 23328 KB Output is correct
55 Correct 15 ms 16332 KB Output is correct
56 Correct 16 ms 16348 KB Output is correct
57 Correct 16 ms 16332 KB Output is correct
58 Correct 16 ms 16332 KB Output is correct
59 Correct 17 ms 16488 KB Output is correct
60 Correct 109 ms 21356 KB Output is correct
61 Correct 18 ms 16332 KB Output is correct
62 Correct 168 ms 23544 KB Output is correct

Subtask #3
83.0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 15180 KB Output is correct
2 Correct 9 ms 15180 KB Output is correct
3 Correct 9 ms 15180 KB Output is correct
4 Correct 9 ms 15180 KB Output is correct
5 Correct 9 ms 15148 KB Output is correct
6 Correct 9 ms 15180 KB Output is correct
7 Correct 10 ms 15180 KB Output is correct
8 Correct 10 ms 15180 KB Output is correct
9 Correct 10 ms 15240 KB Output is correct
10 Correct 9 ms 15180 KB Output is correct
11 Correct 11 ms 15224 KB Output is correct
12 Correct 9 ms 15180 KB Output is correct
13 Correct 10 ms 15204 KB Output is correct
14 Correct 9 ms 15204 KB Output is correct
15 Correct 9 ms 15180 KB Output is correct
16 Correct 9 ms 15204 KB Output is correct
17 Correct 10 ms 15180 KB Output is correct
18 Correct 10 ms 15180 KB Output is correct
19 Correct 9 ms 15180 KB Output is correct
20 Correct 9 ms 15180 KB Output is correct
21 Correct 10 ms 15204 KB Output is correct
22 Correct 11 ms 15180 KB Output is correct
23 Correct 10 ms 15180 KB Output is correct
24 Correct 10 ms 15180 KB Output is correct
25 Correct 11 ms 15236 KB Output is correct
26 Correct 9 ms 15200 KB Output is correct
27 Correct 9 ms 15204 KB Output is correct
28 Correct 9 ms 15180 KB Output is correct
29 Correct 10 ms 15200 KB Output is correct
30 Correct 10 ms 15224 KB Output is correct
31 Correct 10 ms 15180 KB Output is correct
32 Correct 9 ms 15196 KB Output is correct
33 Correct 10 ms 15180 KB Output is correct
34 Correct 13 ms 15336 KB Output is correct
35 Correct 108 ms 21168 KB Output is correct
36 Correct 149 ms 24060 KB Output is correct
37 Correct 136 ms 24132 KB Output is correct
38 Correct 135 ms 23836 KB Output is correct
39 Correct 15 ms 16076 KB Output is correct
40 Correct 18 ms 16432 KB Output is correct
41 Correct 17 ms 16460 KB Output is correct
42 Correct 13 ms 15948 KB Output is correct
43 Correct 14 ms 16044 KB Output is correct
44 Correct 13 ms 15948 KB Output is correct
45 Correct 13 ms 15948 KB Output is correct
46 Correct 14 ms 15948 KB Output is correct
47 Correct 17 ms 16304 KB Output is correct
48 Correct 15 ms 16204 KB Output is correct
49 Correct 22 ms 16992 KB Output is correct
50 Correct 138 ms 24292 KB Output is correct
51 Correct 20 ms 16492 KB Output is correct
52 Correct 125 ms 22492 KB Output is correct
53 Correct 24 ms 16816 KB Output is correct
54 Correct 128 ms 23328 KB Output is correct
55 Correct 15 ms 16332 KB Output is correct
56 Correct 16 ms 16348 KB Output is correct
57 Correct 16 ms 16332 KB Output is correct
58 Correct 16 ms 16332 KB Output is correct
59 Correct 17 ms 16488 KB Output is correct
60 Correct 109 ms 21356 KB Output is correct
61 Correct 18 ms 16332 KB Output is correct
62 Correct 168 ms 23544 KB Output is correct
63 Correct 544 ms 70116 KB Output is correct
64 Correct 565 ms 70072 KB Output is correct
65 Correct 563 ms 70068 KB Output is correct
66 Correct 427 ms 58992 KB Output is correct
67 Correct 918 ms 88608 KB Output is correct
68 Correct 415 ms 58876 KB Output is correct
69 Correct 553 ms 58772 KB Output is correct
70 Correct 510 ms 58888 KB Output is correct
71 Correct 471 ms 58996 KB Output is correct
72 Correct 935 ms 71744 KB Output is correct
73 Correct 949 ms 73516 KB Output is correct
74 Correct 1699 ms 102580 KB Output is correct
75 Correct 802 ms 65548 KB Output is correct
76 Correct 1108 ms 80748 KB Output is correct
77 Correct 1227 ms 81068 KB Output is correct
78 Correct 351 ms 48516 KB Output is correct
79 Correct 698 ms 62172 KB Output is correct
80 Correct 358 ms 53036 KB Output is correct
81 Correct 660 ms 61848 KB Output is correct
82 Correct 922 ms 73524 KB Output is correct
83 Correct 947 ms 73496 KB Output is correct
84 Correct 1004 ms 73388 KB Output is correct
85 Correct 880 ms 73444 KB Output is correct
86 Correct 775 ms 94288 KB Output is correct
87 Correct 788 ms 95384 KB Output is correct
88 Correct 916 ms 72824 KB Output is correct
89 Correct 1120 ms 78172 KB Output is correct