oj.uz

Submission #322009

# Submission time Handle Problem Language Result Execution time Memory
322009 2020-11-13T17:21:36 Z aZvezda Making Friends on Joitter is Fun (JOI20_joitter2) C++14
100 / 100
 2000 ms 74092 KB 
#include <bits/stdc++.h>
using namespace std;
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#define endl "\n"
typedef long long ll;
template<class T, class T2> inline ostream &operator <<(ostream &out, const pair<T, T2> &x) { out << x.first << " " << x.second; return out;}
template<class T, class T2> inline istream &operator >>(istream &in, pair<T, T2> &x) { in >> x.first >> x.second; return in;}
template<class T, class T2> inline bool chkmax(T &x, const T2 &y) { return x < y ? x = y, 1 : 0; }
template<class T, class T2> inline bool chkmin(T &x, const T2 &y) { return x > y ? x = y, 1 : 0; }
const ll mod = 1e9 + 7;
#define out(x) "{" << (#x) << ": " << x << "} "

const int MAX_N = 1e5 + 10;

ll par[MAX_N], sz[MAX_N];
set<pair<int, int>> perr[MAX_N];

set<pair<int, int> > between;
set<int> toClique[MAX_N];

ll ans, in[MAX_N];

int find(int x) {
	if(x == par[x]) {
		return x;
	} else {
		return par[x] = find(par[x]);
	}
}

void remove(int x, int y) {
	ll compx = find(x), compy = find(y);
	if(compx == compy) {return;}
	//cout << "Remove " << x << " " << y << " " << compx << " " << compy  << endl;
	if(between.find({compx, compy}) == between.end()) {
		between.erase({compx, compy});			
	}

 	perr[compx].erase({x, y});
	perr[compy].erase({x, y});

	ans -= sz[compy];
	in[compy] --;
	toClique[x].erase(compy);
} 

void add(int x, int y) {
	ll compx = find(x), compy = find(y);
	if(compx == compy) {return;}
	if(toClique[x].find(compy) != toClique[x].end()) {return;}
	
	between.insert({compx, compy});
 	perr[compx].insert({x, y});
	perr[compy].insert({x, y});
	
	ans += sz[compy];
	in[compy] ++;
	toClique[x].insert(compy);
}

stack<pair<int, int> > st;

void merge(int x, int y) {
	if(x == y) {return;}
	ans -= (sz[x] * sz[x] - sz[x]);
	ans -= (sz[y] * sz[y] - sz[y]);
	if(perr[x].size() + sz[x] < perr[y].size() + sz[y]) {swap(x, y);}
	vector<pair<int, int> > toMove;
	for(auto it : perr[y]) {toMove.push_back(it);}
	perr[y].clear();
	for(auto it : toMove) {
		remove(it.first, it.second);
		st.push(it);
	}
	ans += in[x] * sz[y];
	par[y] = x;
	sz[x] += sz[y]; 
	ans += (sz[x] * sz[x] - sz[x]);
}

void fixStack() {
	while(!st.empty()) {
		auto curr = st.top(); st.pop();
		pair<int, int> comp = {find(curr.first), find(curr.second)};
		if(comp.first == comp.second) {continue;}
		if(between.find({comp.second, comp.first}) != between.end()) {
			merge(comp.first, comp.second);
		} else {
			add(curr.first, curr.second);
		}
	}	
}

signed main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
	for(int i = 0; i < MAX_N; i ++) {par[i] = i; sz[i] = 1;}
	int n, m;
	cin >> n >> m;
	for(int i = 0; i < m; i ++) {
		int a, b;
		cin >> a >> b;
		st.push({a, b});
		fixStack();
		cout << ans << endl;
	}
	return 0;
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11244 KB Output is correct
2 Correct 7 ms 11244 KB Output is correct
3 Correct 7 ms 11244 KB Output is correct
4 Correct 7 ms 11244 KB Output is correct
5 Correct 8 ms 11264 KB Output is correct
6 Correct 8 ms 11392 KB Output is correct
7 Correct 8 ms 11372 KB Output is correct
8 Correct 8 ms 11372 KB Output is correct
9 Correct 8 ms 11372 KB Output is correct
10 Correct 7 ms 11244 KB Output is correct
11 Correct 7 ms 11244 KB Output is correct
12 Correct 7 ms 11244 KB Output is correct
13 Correct 7 ms 11244 KB Output is correct
14 Correct 7 ms 11244 KB Output is correct
15 Correct 8 ms 11244 KB Output is correct
16 Correct 7 ms 11244 KB Output is correct
17 Correct 7 ms 11244 KB Output is correct
18 Correct 8 ms 11244 KB Output is correct
19 Correct 7 ms 11244 KB Output is correct
20 Correct 8 ms 11392 KB Output is correct
21 Correct 9 ms 11516 KB Output is correct
22 Correct 7 ms 11372 KB Output is correct
23 Correct 8 ms 11500 KB Output is correct
24 Correct 9 ms 11372 KB Output is correct
25 Correct 8 ms 11372 KB Output is correct
26 Correct 8 ms 11372 KB Output is correct
27 Correct 8 ms 11372 KB Output is correct
28 Correct 7 ms 11372 KB Output is correct
29 Correct 8 ms 11372 KB Output is correct
30 Correct 7 ms 11244 KB Output is correct
31 Correct 9 ms 11372 KB Output is correct
32 Correct 8 ms 11244 KB Output is correct
33 Correct 8 ms 11500 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11244 KB Output is correct
2 Correct 7 ms 11244 KB Output is correct
3 Correct 7 ms 11244 KB Output is correct
4 Correct 7 ms 11244 KB Output is correct
5 Correct 8 ms 11264 KB Output is correct
6 Correct 8 ms 11392 KB Output is correct
7 Correct 8 ms 11372 KB Output is correct
8 Correct 8 ms 11372 KB Output is correct
9 Correct 8 ms 11372 KB Output is correct
10 Correct 7 ms 11244 KB Output is correct
11 Correct 7 ms 11244 KB Output is correct
12 Correct 7 ms 11244 KB Output is correct
13 Correct 7 ms 11244 KB Output is correct
14 Correct 7 ms 11244 KB Output is correct
15 Correct 8 ms 11244 KB Output is correct
16 Correct 7 ms 11244 KB Output is correct
17 Correct 7 ms 11244 KB Output is correct
18 Correct 8 ms 11244 KB Output is correct
19 Correct 7 ms 11244 KB Output is correct
20 Correct 8 ms 11392 KB Output is correct
21 Correct 9 ms 11516 KB Output is correct
22 Correct 7 ms 11372 KB Output is correct
23 Correct 8 ms 11500 KB Output is correct
24 Correct 9 ms 11372 KB Output is correct
25 Correct 8 ms 11372 KB Output is correct
26 Correct 8 ms 11372 KB Output is correct
27 Correct 8 ms 11372 KB Output is correct
28 Correct 7 ms 11372 KB Output is correct
29 Correct 8 ms 11372 KB Output is correct
30 Correct 7 ms 11244 KB Output is correct
31 Correct 9 ms 11372 KB Output is correct
32 Correct 8 ms 11244 KB Output is correct
33 Correct 8 ms 11500 KB Output is correct
34 Correct 11 ms 11372 KB Output is correct
35 Correct 108 ms 15212 KB Output is correct
36 Correct 151 ms 20588 KB Output is correct
37 Correct 151 ms 21100 KB Output is correct
38 Correct 144 ms 20608 KB Output is correct
39 Correct 11 ms 11500 KB Output is correct
40 Correct 12 ms 11628 KB Output is correct
41 Correct 12 ms 11628 KB Output is correct
42 Correct 10 ms 11500 KB Output is correct
43 Correct 11 ms 11628 KB Output is correct
44 Correct 11 ms 11628 KB Output is correct
45 Correct 10 ms 11500 KB Output is correct
46 Correct 10 ms 11500 KB Output is correct
47 Correct 12 ms 11648 KB Output is correct
48 Correct 12 ms 11628 KB Output is correct
49 Correct 24 ms 12652 KB Output is correct
50 Correct 155 ms 21100 KB Output is correct
51 Correct 17 ms 12012 KB Output is correct
52 Correct 121 ms 18924 KB Output is correct
53 Correct 24 ms 12524 KB Output is correct
54 Correct 134 ms 19948 KB Output is correct
55 Correct 16 ms 12140 KB Output is correct
56 Correct 16 ms 12140 KB Output is correct
57 Correct 16 ms 12140 KB Output is correct
58 Correct 15 ms 12140 KB Output is correct
59 Correct 10 ms 11500 KB Output is correct
60 Correct 100 ms 16492 KB Output is correct
61 Correct 14 ms 11756 KB Output is correct
62 Correct 145 ms 20332 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11244 KB Output is correct
2 Correct 7 ms 11244 KB Output is correct
3 Correct 7 ms 11244 KB Output is correct
4 Correct 7 ms 11244 KB Output is correct
5 Correct 8 ms 11264 KB Output is correct
6 Correct 8 ms 11392 KB Output is correct
7 Correct 8 ms 11372 KB Output is correct
8 Correct 8 ms 11372 KB Output is correct
9 Correct 8 ms 11372 KB Output is correct
10 Correct 7 ms 11244 KB Output is correct
11 Correct 7 ms 11244 KB Output is correct
12 Correct 7 ms 11244 KB Output is correct
13 Correct 7 ms 11244 KB Output is correct
14 Correct 7 ms 11244 KB Output is correct
15 Correct 8 ms 11244 KB Output is correct
16 Correct 7 ms 11244 KB Output is correct
17 Correct 7 ms 11244 KB Output is correct
18 Correct 8 ms 11244 KB Output is correct
19 Correct 7 ms 11244 KB Output is correct
20 Correct 8 ms 11392 KB Output is correct
21 Correct 9 ms 11516 KB Output is correct
22 Correct 7 ms 11372 KB Output is correct
23 Correct 8 ms 11500 KB Output is correct
24 Correct 9 ms 11372 KB Output is correct
25 Correct 8 ms 11372 KB Output is correct
26 Correct 8 ms 11372 KB Output is correct
27 Correct 8 ms 11372 KB Output is correct
28 Correct 7 ms 11372 KB Output is correct
29 Correct 8 ms 11372 KB Output is correct
30 Correct 7 ms 11244 KB Output is correct
31 Correct 9 ms 11372 KB Output is correct
32 Correct 8 ms 11244 KB Output is correct
33 Correct 8 ms 11500 KB Output is correct
34 Correct 11 ms 11372 KB Output is correct
35 Correct 108 ms 15212 KB Output is correct
36 Correct 151 ms 20588 KB Output is correct
37 Correct 151 ms 21100 KB Output is correct
38 Correct 144 ms 20608 KB Output is correct
39 Correct 11 ms 11500 KB Output is correct
40 Correct 12 ms 11628 KB Output is correct
41 Correct 12 ms 11628 KB Output is correct
42 Correct 10 ms 11500 KB Output is correct
43 Correct 11 ms 11628 KB Output is correct
44 Correct 11 ms 11628 KB Output is correct
45 Correct 10 ms 11500 KB Output is correct
46 Correct 10 ms 11500 KB Output is correct
47 Correct 12 ms 11648 KB Output is correct
48 Correct 12 ms 11628 KB Output is correct
49 Correct 24 ms 12652 KB Output is correct
50 Correct 155 ms 21100 KB Output is correct
51 Correct 17 ms 12012 KB Output is correct
52 Correct 121 ms 18924 KB Output is correct
53 Correct 24 ms 12524 KB Output is correct
54 Correct 134 ms 19948 KB Output is correct
55 Correct 16 ms 12140 KB Output is correct
56 Correct 16 ms 12140 KB Output is correct
57 Correct 16 ms 12140 KB Output is correct
58 Correct 15 ms 12140 KB Output is correct
59 Correct 10 ms 11500 KB Output is correct
60 Correct 100 ms 16492 KB Output is correct
61 Correct 14 ms 11756 KB Output is correct
62 Correct 145 ms 20332 KB Output is correct
63 Correct 1115 ms 74092 KB Output is correct
64 Correct 1122 ms 74092 KB Output is correct
65 Correct 1115 ms 74092 KB Output is correct
66 Correct 212 ms 21228 KB Output is correct
67 Correct 606 ms 27116 KB Output is correct
68 Correct 205 ms 21228 KB Output is correct
69 Correct 508 ms 27244 KB Output is correct
70 Correct 218 ms 21228 KB Output is correct
71 Correct 215 ms 21228 KB Output is correct
72 Correct 659 ms 27500 KB Output is correct
73 Correct 642 ms 27500 KB Output is correct
74 Correct 2000 ms 52828 KB Output is correct
75 Correct 916 ms 35436 KB Output is correct
76 Correct 1467 ms 44792 KB Output is correct
77 Correct 1441 ms 44652 KB Output is correct
78 Correct 342 ms 28496 KB Output is correct
79 Correct 664 ms 32572 KB Output is correct
80 Correct 282 ms 28268 KB Output is correct
81 Correct 463 ms 31548 KB Output is correct
82 Correct 1321 ms 53512 KB Output is correct
83 Correct 1330 ms 53580 KB Output is correct
84 Correct 1303 ms 53228 KB Output is correct
85 Correct 1264 ms 53356 KB Output is correct
86 Correct 250 ms 20556 KB Output is correct
87 Correct 271 ms 22764 KB Output is correct
88 Correct 672 ms 27596 KB Output is correct
89 Correct 1383 ms 43116 KB Output is correct