oj.uz

Submission #431177

# Submission time Handle Problem Language Result Execution time Memory
431177 2021-06-17T10:08:41 Z Kevin_Zhang_TW Making Friends on Joitter is Fun (JOI20_joitter2) C++17
17 / 100
 5000 ms 269820 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif
// My bug list :
// integer overflow
// 0based, 1based forgotten
// index out of bound
// n, m, i, j typo
// some cases are missing
 
const int MAX_N = 100010;
 
ll ans;
 
int n, m, g[MAX_N], sz[MAX_N], cost[MAX_N];

ll cntin[MAX_N];
 
unordered_map<int, set<pair<int,int>>> in[MAX_N], out[MAX_N];
 
void init() {
	iota(g, g+n+1, 0);
	fill(sz, sz + n + 1, 1);
}
 
int F(int i) { return i == g[i] ? i : g[i] = F(g[i]); }

void rm(int x, int u) {
	--cost[x], --cost[u];
	ans -= sz[ F(u) ];
	--cntin[ F(u) ];
	in[F(u)][F(x)].erase({x, u});
	out[F(x)][F(u)].erase({x, u});
}
void ad(int x, int u) {
	++cost[x], ++cost[u];
	ans += sz[ F(u) ];
	++cntin[ F(u) ];
	in[F(u)][F(x)].insert({x, u});
	out[F(x)][F(u)].insert({x, u});
}

bool mcnt(set<pair<int,int>> &st, int k) {
	return st.lower_bound({k, -1}) != st.upper_bound({k+1, -1});
}

void kick(int a, int b) {
	auto vec = out[F(a)][F(b)];
	for (auto [x, y] : vec) rm(x, y);
}

bool no_merge(int a, int b) {
	if (F(a) == F(b)) return true;
	if (out[F(b)][F(a)].empty()) return true;
	return false;
}
void add_edge(int a, int b) {
	if (F(a) == F(b)) return;
	// if a already connected to group(b), then nothing happen
	if (mcnt(in[F(b)][F(a)], a)) return;
	ad(a, b);
	if (out[F(b)][F(a)].empty()) return;

	a = F(a), b = F(b);

	if (cost[a] > cost[b]) swap(a, b);
	kick(a, b), kick(b, a);

	vector<pair<int,int>> kl;
	for (auto [_, vec] : in[a])
		for (auto p : vec) kl.pb(p);
		//kl.insert(end(kl), AI(vec));
	for (auto [_, vec] : out[a]) 
		for (auto p : vec) kl.pb(p);
		//kl.insert(end(kl), AI(vec));

	in[a].clear(), out[a].clear();

	for (auto [x, y] : kl) rm(x, y);

	ans += 2ll * sz[a] * sz[b] + 1ll * cntin[b] * sz[a];

	sz[b] += sz[a], g[a] = b;

	for (auto [x, y] : kl)
		add_edge(x, y);
//	vector<pair<int,int>> tmp;
//	for (auto [x, y] : kl) {
//		if (no_merge(x, y))
//			add_edge(x, y);
//		else tmp.pb(x, y);
//	}
//	for (auto [x, y] : tmp)
//		add_edge(x, y);
}
 
int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> n >> m;
	vector<pair<int,int>> alle(m);
	for (auto &[a, b] : alle) cin >> a >> b;
	vector<ll> res;

	init();
	for (auto [a, b] : alle) {
		add_edge(a, b);
		res.pb(ans);
	}
	for (auto i : res) cout << i << '\n';

}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11212 KB Output is correct
2 Correct 8 ms 11212 KB Output is correct
3 Correct 8 ms 11292 KB Output is correct
4 Correct 8 ms 11212 KB Output is correct
5 Correct 9 ms 11300 KB Output is correct
6 Correct 8 ms 11284 KB Output is correct
7 Correct 9 ms 11340 KB Output is correct
8 Correct 9 ms 11456 KB Output is correct
9 Correct 11 ms 11368 KB Output is correct
10 Correct 8 ms 11212 KB Output is correct
11 Correct 9 ms 11212 KB Output is correct
12 Correct 8 ms 11208 KB Output is correct
13 Correct 8 ms 11272 KB Output is correct
14 Correct 9 ms 11320 KB Output is correct
15 Correct 10 ms 11212 KB Output is correct
16 Correct 8 ms 11212 KB Output is correct
17 Correct 8 ms 11212 KB Output is correct
18 Correct 10 ms 11324 KB Output is correct
19 Correct 9 ms 11212 KB Output is correct
20 Correct 8 ms 11340 KB Output is correct
21 Correct 10 ms 11448 KB Output is correct
22 Correct 9 ms 11236 KB Output is correct
23 Correct 9 ms 11340 KB Output is correct
24 Correct 9 ms 11340 KB Output is correct
25 Correct 10 ms 11340 KB Output is correct
26 Correct 8 ms 11340 KB Output is correct
27 Correct 9 ms 11340 KB Output is correct
28 Correct 8 ms 11340 KB Output is correct
29 Correct 9 ms 11340 KB Output is correct
30 Correct 8 ms 11212 KB Output is correct
31 Correct 9 ms 11372 KB Output is correct
32 Correct 9 ms 11212 KB Output is correct
33 Correct 9 ms 11340 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11212 KB Output is correct
2 Correct 8 ms 11212 KB Output is correct
3 Correct 8 ms 11292 KB Output is correct
4 Correct 8 ms 11212 KB Output is correct
5 Correct 9 ms 11300 KB Output is correct
6 Correct 8 ms 11284 KB Output is correct
7 Correct 9 ms 11340 KB Output is correct
8 Correct 9 ms 11456 KB Output is correct
9 Correct 11 ms 11368 KB Output is correct
10 Correct 8 ms 11212 KB Output is correct
11 Correct 9 ms 11212 KB Output is correct
12 Correct 8 ms 11208 KB Output is correct
13 Correct 8 ms 11272 KB Output is correct
14 Correct 9 ms 11320 KB Output is correct
15 Correct 10 ms 11212 KB Output is correct
16 Correct 8 ms 11212 KB Output is correct
17 Correct 8 ms 11212 KB Output is correct
18 Correct 10 ms 11324 KB Output is correct
19 Correct 9 ms 11212 KB Output is correct
20 Correct 8 ms 11340 KB Output is correct
21 Correct 10 ms 11448 KB Output is correct
22 Correct 9 ms 11236 KB Output is correct
23 Correct 9 ms 11340 KB Output is correct
24 Correct 9 ms 11340 KB Output is correct
25 Correct 10 ms 11340 KB Output is correct
26 Correct 8 ms 11340 KB Output is correct
27 Correct 9 ms 11340 KB Output is correct
28 Correct 8 ms 11340 KB Output is correct
29 Correct 9 ms 11340 KB Output is correct
30 Correct 8 ms 11212 KB Output is correct
31 Correct 9 ms 11372 KB Output is correct
32 Correct 9 ms 11212 KB Output is correct
33 Correct 9 ms 11340 KB Output is correct
34 Correct 14 ms 11724 KB Output is correct
35 Correct 167 ms 23756 KB Output is correct
36 Correct 380 ms 34596 KB Output is correct
37 Correct 303 ms 34220 KB Output is correct
38 Correct 304 ms 34236 KB Output is correct
39 Correct 12 ms 11852 KB Output is correct
40 Correct 16 ms 12236 KB Output is correct
41 Correct 14 ms 12272 KB Output is correct
42 Correct 12 ms 12212 KB Output is correct
43 Correct 15 ms 12228 KB Output is correct
44 Correct 13 ms 12220 KB Output is correct
45 Correct 12 ms 11864 KB Output is correct
46 Correct 12 ms 11828 KB Output is correct
47 Correct 39 ms 15316 KB Output is correct
48 Correct 39 ms 15556 KB Output is correct
49 Correct 210 ms 27464 KB Output is correct
50 Correct 301 ms 33256 KB Output is correct
51 Correct 23 ms 12976 KB Output is correct
52 Correct 153 ms 23884 KB Output is correct
53 Correct 484 ms 40864 KB Output is correct
54 Correct 355 ms 35500 KB Output is correct
55 Correct 1055 ms 71316 KB Output is correct
56 Correct 1039 ms 68548 KB Output is correct
57 Correct 807 ms 58848 KB Output is correct
58 Correct 1143 ms 72436 KB Output is correct
59 Correct 15 ms 12008 KB Output is correct
60 Correct 115 ms 19036 KB Output is correct
61 Correct 262 ms 27164 KB Output is correct
62 Correct 362 ms 35192 KB Output is correct

Subtask #3
0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11212 KB Output is correct
2 Correct 8 ms 11212 KB Output is correct
3 Correct 8 ms 11292 KB Output is correct
4 Correct 8 ms 11212 KB Output is correct
5 Correct 9 ms 11300 KB Output is correct
6 Correct 8 ms 11284 KB Output is correct
7 Correct 9 ms 11340 KB Output is correct
8 Correct 9 ms 11456 KB Output is correct
9 Correct 11 ms 11368 KB Output is correct
10 Correct 8 ms 11212 KB Output is correct
11 Correct 9 ms 11212 KB Output is correct
12 Correct 8 ms 11208 KB Output is correct
13 Correct 8 ms 11272 KB Output is correct
14 Correct 9 ms 11320 KB Output is correct
15 Correct 10 ms 11212 KB Output is correct
16 Correct 8 ms 11212 KB Output is correct
17 Correct 8 ms 11212 KB Output is correct
18 Correct 10 ms 11324 KB Output is correct
19 Correct 9 ms 11212 KB Output is correct
20 Correct 8 ms 11340 KB Output is correct
21 Correct 10 ms 11448 KB Output is correct
22 Correct 9 ms 11236 KB Output is correct
23 Correct 9 ms 11340 KB Output is correct
24 Correct 9 ms 11340 KB Output is correct
25 Correct 10 ms 11340 KB Output is correct
26 Correct 8 ms 11340 KB Output is correct
27 Correct 9 ms 11340 KB Output is correct
28 Correct 8 ms 11340 KB Output is correct
29 Correct 9 ms 11340 KB Output is correct
30 Correct 8 ms 11212 KB Output is correct
31 Correct 9 ms 11372 KB Output is correct
32 Correct 9 ms 11212 KB Output is correct
33 Correct 9 ms 11340 KB Output is correct
34 Correct 14 ms 11724 KB Output is correct
35 Correct 167 ms 23756 KB Output is correct
36 Correct 380 ms 34596 KB Output is correct
37 Correct 303 ms 34220 KB Output is correct
38 Correct 304 ms 34236 KB Output is correct
39 Correct 12 ms 11852 KB Output is correct
40 Correct 16 ms 12236 KB Output is correct
41 Correct 14 ms 12272 KB Output is correct
42 Correct 12 ms 12212 KB Output is correct
43 Correct 15 ms 12228 KB Output is correct
44 Correct 13 ms 12220 KB Output is correct
45 Correct 12 ms 11864 KB Output is correct
46 Correct 12 ms 11828 KB Output is correct
47 Correct 39 ms 15316 KB Output is correct
48 Correct 39 ms 15556 KB Output is correct
49 Correct 210 ms 27464 KB Output is correct
50 Correct 301 ms 33256 KB Output is correct
51 Correct 23 ms 12976 KB Output is correct
52 Correct 153 ms 23884 KB Output is correct
53 Correct 484 ms 40864 KB Output is correct
54 Correct 355 ms 35500 KB Output is correct
55 Correct 1055 ms 71316 KB Output is correct
56 Correct 1039 ms 68548 KB Output is correct
57 Correct 807 ms 58848 KB Output is correct
58 Correct 1143 ms 72436 KB Output is correct
59 Correct 15 ms 12008 KB Output is correct
60 Correct 115 ms 19036 KB Output is correct
61 Correct 262 ms 27164 KB Output is correct
62 Correct 362 ms 35192 KB Output is correct
63 Correct 928 ms 139948 KB Output is correct
64 Correct 1061 ms 139932 KB Output is correct
65 Correct 978 ms 139840 KB Output is correct
66 Correct 328 ms 40340 KB Output is correct
67 Correct 835 ms 62016 KB Output is correct
68 Correct 404 ms 58720 KB Output is correct
69 Correct 616 ms 63744 KB Output is correct
70 Correct 301 ms 40400 KB Output is correct
71 Correct 292 ms 40348 KB Output is correct
72 Execution timed out 5029 ms 269820 KB Time limit exceeded
73 Halted 0 ms 0 KB -