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답안 #259760

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
259760 2020-08-08T13:03:39 Z amoo_safar 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++17
100 / 100
 1430 ms 67708 KB 
// Zende bad Shoma nasime faghat !
#include <bits/stdc++.h>

#define pb push_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " : " << x << '\n'

using namespace std;

typedef long long ll;
typedef long double ld;
typedef string str;
typedef pair<ll, ll> pll;

const ll Mod = 1000000007LL;
const int N = 1e5 + 10;
const ll Inf = 2242545357980376863LL;
const ll Log = 30;

ll ans;
int n, m;

set<int> I[N], O[N];

int par[N], sz[N];
set<int> st[N];

vector<pll> U;


ll Calc(int com){
	ll res = 0;
	res = 1ll * sz[com] * st[com].size();
	res -= sz[com];
	return res;
}

int Find(int u){
	if(par[u] == u) return u;
	return par[u] = Find(par[u]);
}

void AddE(int u, int v){
	v = Find(v);
	ans -= Calc(v);
	st[v].insert(u);
	ans += Calc(v);

	u = Find(u); v = Find(v);
	
	O[u].insert(v);
	I[v].insert(u);
	
	if(I[u].count(v)){
		U.pb({u, v});
	}
}
void Unite(int u, int v){
	u = Find(u); v = Find(v);
	if(u == v) return ;
	if(sz[u] > sz[v]) swap(u, v);
	
	ans -= Calc(u); ans -= Calc(v);
	for(auto x : st[u]){
		//AddE(x, v);
		st[v].insert(x);
	}
	for(auto x : I[u]){
		if(O[v].count(x)){
			U.pb({v, x});
		}

		I[v].insert(x);
		
		O[x].erase(u);
		O[x].insert(v);
	}

	for(auto x : O[u]){
		
		if(I[v].count(x)){
			U.pb({v, x});
		}

		O[v].insert(x);
		
		I[x].erase(u);
		I[x].insert(v);
	}

	st[u].clear(); I[u].clear(); O[u].clear();
	//st[u].shrink_to_fit();

	par[u] = v;
	sz[v] += sz[u];
	ans += Calc(v);
}

int main(){
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	iota(par, par + N, 0);
	fill(sz, sz + N, 1);
	cin >> n >> m;
	for(int i = 1; i <= n; i++) st[i].insert(i);

	int u, v;
	for(int i = 0; i < m; i++){
		cin >> u >> v;
		AddE(u, v);
		int f1, f2;
		while(!U.empty()){
			f1 = U.back().F; f2 = U.back().S;
			U.pop_back();
			Unite(f1, f2);
			//cerr << "# " << f1 << ' ' << f2 << '\n';
		}
		cout << ans << '\n';
	}
	return 0;
}
/*
4 6
1 2
2 1
3 4
4 3
1 3
4 2


8 14
1 2
2 1

3 4
4 5
5 4
4 3

6 7
7 8
8 7
7 6

1 3
4 7
6 1

8 5

*/

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 15232 KB Output is correct
2 Correct 10 ms 15360 KB Output is correct
3 Correct 9 ms 15232 KB Output is correct
4 Correct 9 ms 15232 KB Output is correct
5 Correct 9 ms 15232 KB Output is correct
6 Correct 10 ms 15232 KB Output is correct
7 Correct 10 ms 15232 KB Output is correct
8 Correct 10 ms 15232 KB Output is correct
9 Correct 10 ms 15232 KB Output is correct
10 Correct 9 ms 15232 KB Output is correct
11 Correct 9 ms 15232 KB Output is correct
12 Correct 9 ms 15232 KB Output is correct
13 Correct 10 ms 15232 KB Output is correct
14 Correct 9 ms 15232 KB Output is correct
15 Correct 10 ms 15232 KB Output is correct
16 Correct 9 ms 15232 KB Output is correct
17 Correct 9 ms 15232 KB Output is correct
18 Correct 9 ms 15276 KB Output is correct
19 Correct 10 ms 15232 KB Output is correct
20 Correct 9 ms 15232 KB Output is correct
21 Correct 10 ms 15232 KB Output is correct
22 Correct 9 ms 15156 KB Output is correct
23 Correct 10 ms 15232 KB Output is correct
24 Correct 10 ms 15232 KB Output is correct
25 Correct 11 ms 15360 KB Output is correct
26 Correct 9 ms 15232 KB Output is correct
27 Correct 9 ms 15232 KB Output is correct
28 Correct 9 ms 15232 KB Output is correct
29 Correct 9 ms 15232 KB Output is correct
30 Correct 9 ms 15232 KB Output is correct
31 Correct 10 ms 15208 KB Output is correct
32 Correct 9 ms 15232 KB Output is correct
33 Correct 10 ms 15232 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 15232 KB Output is correct
2 Correct 10 ms 15360 KB Output is correct
3 Correct 9 ms 15232 KB Output is correct
4 Correct 9 ms 15232 KB Output is correct
5 Correct 9 ms 15232 KB Output is correct
6 Correct 10 ms 15232 KB Output is correct
7 Correct 10 ms 15232 KB Output is correct
8 Correct 10 ms 15232 KB Output is correct
9 Correct 10 ms 15232 KB Output is correct
10 Correct 9 ms 15232 KB Output is correct
11 Correct 9 ms 15232 KB Output is correct
12 Correct 9 ms 15232 KB Output is correct
13 Correct 10 ms 15232 KB Output is correct
14 Correct 9 ms 15232 KB Output is correct
15 Correct 10 ms 15232 KB Output is correct
16 Correct 9 ms 15232 KB Output is correct
17 Correct 9 ms 15232 KB Output is correct
18 Correct 9 ms 15276 KB Output is correct
19 Correct 10 ms 15232 KB Output is correct
20 Correct 9 ms 15232 KB Output is correct
21 Correct 10 ms 15232 KB Output is correct
22 Correct 9 ms 15156 KB Output is correct
23 Correct 10 ms 15232 KB Output is correct
24 Correct 10 ms 15232 KB Output is correct
25 Correct 11 ms 15360 KB Output is correct
26 Correct 9 ms 15232 KB Output is correct
27 Correct 9 ms 15232 KB Output is correct
28 Correct 9 ms 15232 KB Output is correct
29 Correct 9 ms 15232 KB Output is correct
30 Correct 9 ms 15232 KB Output is correct
31 Correct 10 ms 15208 KB Output is correct
32 Correct 9 ms 15232 KB Output is correct
33 Correct 10 ms 15232 KB Output is correct
34 Correct 14 ms 15360 KB Output is correct
35 Correct 150 ms 21380 KB Output is correct
36 Correct 183 ms 24048 KB Output is correct
37 Correct 184 ms 24176 KB Output is correct
38 Correct 184 ms 23796 KB Output is correct
39 Correct 12 ms 15360 KB Output is correct
40 Correct 14 ms 15648 KB Output is correct
41 Correct 15 ms 15616 KB Output is correct
42 Correct 13 ms 15360 KB Output is correct
43 Correct 14 ms 15616 KB Output is correct
44 Correct 14 ms 15488 KB Output is correct
45 Correct 12 ms 15360 KB Output is correct
46 Correct 13 ms 15360 KB Output is correct
47 Correct 15 ms 15488 KB Output is correct
48 Correct 15 ms 15616 KB Output is correct
49 Correct 25 ms 16256 KB Output is correct
50 Correct 197 ms 24180 KB Output is correct
51 Correct 19 ms 15872 KB Output is correct
52 Correct 175 ms 22392 KB Output is correct
53 Correct 23 ms 16256 KB Output is correct
54 Correct 177 ms 23284 KB Output is correct
55 Correct 18 ms 16000 KB Output is correct
56 Correct 18 ms 16000 KB Output is correct
57 Correct 17 ms 16000 KB Output is correct
58 Correct 18 ms 16000 KB Output is correct
59 Correct 16 ms 15488 KB Output is correct
60 Correct 148 ms 20472 KB Output is correct
61 Correct 17 ms 15616 KB Output is correct
62 Correct 184 ms 23544 KB Output is correct

Subtask #3
83.0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 15232 KB Output is correct
2 Correct 10 ms 15360 KB Output is correct
3 Correct 9 ms 15232 KB Output is correct
4 Correct 9 ms 15232 KB Output is correct
5 Correct 9 ms 15232 KB Output is correct
6 Correct 10 ms 15232 KB Output is correct
7 Correct 10 ms 15232 KB Output is correct
8 Correct 10 ms 15232 KB Output is correct
9 Correct 10 ms 15232 KB Output is correct
10 Correct 9 ms 15232 KB Output is correct
11 Correct 9 ms 15232 KB Output is correct
12 Correct 9 ms 15232 KB Output is correct
13 Correct 10 ms 15232 KB Output is correct
14 Correct 9 ms 15232 KB Output is correct
15 Correct 10 ms 15232 KB Output is correct
16 Correct 9 ms 15232 KB Output is correct
17 Correct 9 ms 15232 KB Output is correct
18 Correct 9 ms 15276 KB Output is correct
19 Correct 10 ms 15232 KB Output is correct
20 Correct 9 ms 15232 KB Output is correct
21 Correct 10 ms 15232 KB Output is correct
22 Correct 9 ms 15156 KB Output is correct
23 Correct 10 ms 15232 KB Output is correct
24 Correct 10 ms 15232 KB Output is correct
25 Correct 11 ms 15360 KB Output is correct
26 Correct 9 ms 15232 KB Output is correct
27 Correct 9 ms 15232 KB Output is correct
28 Correct 9 ms 15232 KB Output is correct
29 Correct 9 ms 15232 KB Output is correct
30 Correct 9 ms 15232 KB Output is correct
31 Correct 10 ms 15208 KB Output is correct
32 Correct 9 ms 15232 KB Output is correct
33 Correct 10 ms 15232 KB Output is correct
34 Correct 14 ms 15360 KB Output is correct
35 Correct 150 ms 21380 KB Output is correct
36 Correct 183 ms 24048 KB Output is correct
37 Correct 184 ms 24176 KB Output is correct
38 Correct 184 ms 23796 KB Output is correct
39 Correct 12 ms 15360 KB Output is correct
40 Correct 14 ms 15648 KB Output is correct
41 Correct 15 ms 15616 KB Output is correct
42 Correct 13 ms 15360 KB Output is correct
43 Correct 14 ms 15616 KB Output is correct
44 Correct 14 ms 15488 KB Output is correct
45 Correct 12 ms 15360 KB Output is correct
46 Correct 13 ms 15360 KB Output is correct
47 Correct 15 ms 15488 KB Output is correct
48 Correct 15 ms 15616 KB Output is correct
49 Correct 25 ms 16256 KB Output is correct
50 Correct 197 ms 24180 KB Output is correct
51 Correct 19 ms 15872 KB Output is correct
52 Correct 175 ms 22392 KB Output is correct
53 Correct 23 ms 16256 KB Output is correct
54 Correct 177 ms 23284 KB Output is correct
55 Correct 18 ms 16000 KB Output is correct
56 Correct 18 ms 16000 KB Output is correct
57 Correct 17 ms 16000 KB Output is correct
58 Correct 18 ms 16000 KB Output is correct
59 Correct 16 ms 15488 KB Output is correct
60 Correct 148 ms 20472 KB Output is correct
61 Correct 17 ms 15616 KB Output is correct
62 Correct 184 ms 23544 KB Output is correct
63 Correct 694 ms 67576 KB Output is correct
64 Correct 757 ms 67704 KB Output is correct
65 Correct 739 ms 67708 KB Output is correct
66 Correct 275 ms 24312 KB Output is correct
67 Correct 656 ms 32760 KB Output is correct
68 Correct 284 ms 24440 KB Output is correct
69 Correct 676 ms 31608 KB Output is correct
70 Correct 308 ms 24396 KB Output is correct
71 Correct 301 ms 24312 KB Output is correct
72 Correct 732 ms 32480 KB Output is correct
73 Correct 733 ms 32344 KB Output is correct
74 Correct 1430 ms 45660 KB Output is correct
75 Correct 939 ms 37240 KB Output is correct
76 Correct 1115 ms 43508 KB Output is correct
77 Correct 1069 ms 43516 KB Output is correct
78 Correct 297 ms 32504 KB Output is correct
79 Correct 587 ms 35704 KB Output is correct
80 Correct 325 ms 34808 KB Output is correct
81 Correct 604 ms 38136 KB Output is correct
82 Correct 850 ms 51704 KB Output is correct
83 Correct 904 ms 51704 KB Output is correct
84 Correct 985 ms 54008 KB Output is correct
85 Correct 1097 ms 53868 KB Output is correct
86 Correct 419 ms 28280 KB Output is correct
87 Correct 542 ms 30712 KB Output is correct
88 Correct 659 ms 32276 KB Output is correct
89 Correct 1022 ms 42900 KB Output is correct