oj.uz

Submission #376784

# Submission time Handle Problem Language Result Execution time Memory
376784 2021-03-12T03:51:59 Z fhvirus Mergers (JOI19_mergers) C++17
100 / 100
 976 ms 104420 KB 
// Knapsack DP is harder than FFT.
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii; typedef pair<ll,ll> pll;
#define ff first
#define ss second
#define pb emplace_back
#define FOR(i,n) for(int i = 0; i < (n); ++i)
#define FOO(i,a,b) for(int i = (a); i <= (b); ++i)
#define AI(x) begin(x),end(x)
template<class I> bool chmax(I &a, I b){ return a < b ? (a = b, true) : false;}
template<class I> bool chmin(I &a, I b){ return a > b ? (a = b, true) : false;}
#ifdef OWO
#define debug(args...) LKJ("[ " + string(#args) + " ]", args)
void LKJ(){ cerr<<endl;}
template<class I, class...T> void LKJ(I&&x, T&&...t){ cerr<<x<<", ", LKJ(t...);}
template<class I> void DE(I a, I b){ while(a < b) cerr<<*a<<" \n"[next(a) == b], ++a;}
#else
#define debug(...) 0
#define DE(...) 0
#endif
const int N = 5e5 + 225;
int n, k;
vector<pii> adj[N];
int lst[N];

int low[N], pre[N], tot;
void tarjan(int u, int p){
	low[u] = pre[u] = ++tot;
	int cnt = -1;
	for(int i = 0; i < adj[u].size(); ++i){
		auto &[v, e] = adj[u][i];
		if(v == p and cnt == -1){ cnt = i; continue;}
		if(pre[v] == 0){
			tarjan(v, u);
			chmin(low[u], low[v]);
			if(low[v] == pre[v])
				e = 1;
		}
		else if(pre[v] < pre[u])
			chmin(low[u], pre[v]);
	}
	if(low[u] == pre[u] && cnt != -1)
		adj[u][cnt].ss = 1;
}

int mp[N];

void dfs(int u, int id){
	mp[u] = id;
	for(auto [v, e]: adj[u]){
		if(e) continue;
		if(mp[v]) continue;
		dfs(v, id);
	}
}

int bccnt = 0;
void uni(){
	FOO(i,1,n){
		if(mp[i] == 0){
			dfs(i, ++bccnt);
		}
	}
}

vector<int> G[N];

void mke(){
	FOO(i,1,n){
		for(auto [v, e]: adj[i])
			if(e){
				G[mp[i]].pb(mp[v]);
			}
	}
}

int leaf(int u, int p){
	int ans = 0;
	for(int v: G[u])
		if(v != p)
		ans += leaf(v, u);
	if(G[u].size() <= 1) ++ans;
	return ans;
}

int32_t main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> k;
	for(int a, b, i = 1; i < n; ++i){
		cin >> a >> b;
		adj[a].pb(b, 0);
		adj[b].pb(a, 0);
	}
	for(int i = 1; i <= n; ++i){
		int c; cin >> c;
		if(lst[c] != 0){
			adj[i].pb(lst[c], 0);
			adj[lst[c]].pb(i, 0);
		}
		lst[c] = i;
	}

	tarjan(1, -1);

	uni();

	if(bccnt == 1){
		cout << 0;
		return 0;
	}
	mke();

	int ans = leaf(1, -1);

	cout << (ans + 1) / 2;

	return 0;
}

Compilation message

mergers.cpp: In function 'void tarjan(int, int)':
mergers.cpp:32:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for(int i = 0; i < adj[u].size(); ++i){
      |                 ~~^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 23916 KB Output is correct
2 Correct 20 ms 23916 KB Output is correct
3 Correct 17 ms 23916 KB Output is correct
4 Correct 16 ms 23916 KB Output is correct
5 Correct 17 ms 23916 KB Output is correct
6 Correct 16 ms 23916 KB Output is correct
7 Correct 16 ms 23916 KB Output is correct
8 Correct 16 ms 23916 KB Output is correct
9 Correct 17 ms 23916 KB Output is correct
10 Correct 17 ms 23916 KB Output is correct
11 Correct 18 ms 23916 KB Output is correct
12 Correct 16 ms 23916 KB Output is correct
13 Correct 17 ms 23916 KB Output is correct
14 Correct 17 ms 23916 KB Output is correct
15 Correct 17 ms 23916 KB Output is correct
16 Correct 17 ms 23916 KB Output is correct
17 Correct 16 ms 23916 KB Output is correct
18 Correct 17 ms 23916 KB Output is correct
19 Correct 17 ms 23916 KB Output is correct
20 Correct 16 ms 23916 KB Output is correct
21 Correct 17 ms 23916 KB Output is correct
22 Correct 17 ms 23916 KB Output is correct
23 Correct 17 ms 23916 KB Output is correct
24 Correct 16 ms 23916 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 23916 KB Output is correct
2 Correct 20 ms 23916 KB Output is correct
3 Correct 17 ms 23916 KB Output is correct
4 Correct 16 ms 23916 KB Output is correct
5 Correct 17 ms 23916 KB Output is correct
6 Correct 16 ms 23916 KB Output is correct
7 Correct 16 ms 23916 KB Output is correct
8 Correct 16 ms 23916 KB Output is correct
9 Correct 17 ms 23916 KB Output is correct
10 Correct 17 ms 23916 KB Output is correct
11 Correct 18 ms 23916 KB Output is correct
12 Correct 16 ms 23916 KB Output is correct
13 Correct 17 ms 23916 KB Output is correct
14 Correct 17 ms 23916 KB Output is correct
15 Correct 17 ms 23916 KB Output is correct
16 Correct 17 ms 23916 KB Output is correct
17 Correct 16 ms 23916 KB Output is correct
18 Correct 17 ms 23916 KB Output is correct
19 Correct 17 ms 23916 KB Output is correct
20 Correct 16 ms 23916 KB Output is correct
21 Correct 17 ms 23916 KB Output is correct
22 Correct 17 ms 23916 KB Output is correct
23 Correct 17 ms 23916 KB Output is correct
24 Correct 16 ms 23916 KB Output is correct
25 Correct 16 ms 23916 KB Output is correct
26 Correct 19 ms 24044 KB Output is correct
27 Correct 18 ms 24172 KB Output is correct
28 Correct 20 ms 24172 KB Output is correct
29 Correct 22 ms 24172 KB Output is correct
30 Correct 19 ms 24300 KB Output is correct
31 Correct 16 ms 23916 KB Output is correct
32 Correct 18 ms 24172 KB Output is correct
33 Correct 16 ms 23916 KB Output is correct
34 Correct 19 ms 24172 KB Output is correct
35 Correct 19 ms 24172 KB Output is correct
36 Correct 18 ms 24172 KB Output is correct
37 Correct 18 ms 24044 KB Output is correct
38 Correct 19 ms 23916 KB Output is correct
39 Correct 19 ms 24172 KB Output is correct
40 Correct 21 ms 24300 KB Output is correct
41 Correct 18 ms 24172 KB Output is correct
42 Correct 18 ms 24044 KB Output is correct
43 Correct 18 ms 24300 KB Output is correct
44 Correct 17 ms 23792 KB Output is correct
45 Correct 18 ms 24044 KB Output is correct
46 Correct 18 ms 24044 KB Output is correct
47 Correct 16 ms 23916 KB Output is correct
48 Correct 19 ms 24320 KB Output is correct
49 Correct 18 ms 24172 KB Output is correct
50 Correct 19 ms 24172 KB Output is correct
51 Correct 18 ms 24172 KB Output is correct
52 Correct 18 ms 24172 KB Output is correct
53 Correct 18 ms 24044 KB Output is correct
54 Correct 18 ms 24300 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 23916 KB Output is correct
2 Correct 20 ms 23916 KB Output is correct
3 Correct 17 ms 23916 KB Output is correct
4 Correct 16 ms 23916 KB Output is correct
5 Correct 17 ms 23916 KB Output is correct
6 Correct 16 ms 23916 KB Output is correct
7 Correct 16 ms 23916 KB Output is correct
8 Correct 16 ms 23916 KB Output is correct
9 Correct 17 ms 23916 KB Output is correct
10 Correct 17 ms 23916 KB Output is correct
11 Correct 18 ms 23916 KB Output is correct
12 Correct 16 ms 23916 KB Output is correct
13 Correct 17 ms 23916 KB Output is correct
14 Correct 17 ms 23916 KB Output is correct
15 Correct 17 ms 23916 KB Output is correct
16 Correct 17 ms 23916 KB Output is correct
17 Correct 16 ms 23916 KB Output is correct
18 Correct 17 ms 23916 KB Output is correct
19 Correct 17 ms 23916 KB Output is correct
20 Correct 16 ms 23916 KB Output is correct
21 Correct 17 ms 23916 KB Output is correct
22 Correct 17 ms 23916 KB Output is correct
23 Correct 17 ms 23916 KB Output is correct
24 Correct 16 ms 23916 KB Output is correct
25 Correct 17 ms 23916 KB Output is correct
26 Correct 109 ms 31584 KB Output is correct
27 Correct 132 ms 36844 KB Output is correct
28 Correct 18 ms 24172 KB Output is correct
29 Correct 17 ms 23916 KB Output is correct
30 Correct 17 ms 23916 KB Output is correct
31 Correct 156 ms 32364 KB Output is correct
32 Correct 21 ms 24172 KB Output is correct
33 Correct 131 ms 38508 KB Output is correct
34 Correct 147 ms 35808 KB Output is correct
35 Correct 18 ms 24172 KB Output is correct
36 Correct 131 ms 31852 KB Output is correct
37 Correct 21 ms 24300 KB Output is correct
38 Correct 18 ms 24172 KB Output is correct
39 Correct 114 ms 31708 KB Output is correct
40 Correct 19 ms 24300 KB Output is correct
41 Correct 136 ms 36844 KB Output is correct
42 Correct 138 ms 38380 KB Output is correct
43 Correct 17 ms 23916 KB Output is correct
44 Correct 144 ms 38520 KB Output is correct
45 Correct 138 ms 37356 KB Output is correct
46 Correct 20 ms 24172 KB Output is correct
47 Correct 19 ms 24300 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 113 ms 31604 KB Output is correct
2 Correct 88 ms 32864 KB Output is correct
3 Correct 18 ms 24172 KB Output is correct
4 Correct 18 ms 24172 KB Output is correct
5 Correct 16 ms 24044 KB Output is correct
6 Correct 17 ms 23916 KB Output is correct
7 Correct 20 ms 24172 KB Output is correct
8 Correct 136 ms 32236 KB Output is correct
9 Correct 18 ms 24172 KB Output is correct
10 Correct 141 ms 33280 KB Output is correct
11 Correct 17 ms 23916 KB Output is correct
12 Correct 144 ms 32388 KB Output is correct
13 Correct 166 ms 32236 KB Output is correct
14 Correct 132 ms 34156 KB Output is correct
15 Correct 120 ms 33124 KB Output is correct
16 Correct 18 ms 24044 KB Output is correct
17 Correct 18 ms 23916 KB Output is correct
18 Correct 91 ms 33920 KB Output is correct
19 Correct 139 ms 37484 KB Output is correct
20 Correct 19 ms 24172 KB Output is correct
21 Correct 19 ms 23916 KB Output is correct
22 Correct 102 ms 31832 KB Output is correct
23 Correct 19 ms 24172 KB Output is correct
24 Correct 148 ms 32748 KB Output is correct
25 Correct 128 ms 36972 KB Output is correct
26 Correct 19 ms 24172 KB Output is correct
27 Correct 18 ms 24172 KB Output is correct
28 Correct 20 ms 24172 KB Output is correct
29 Correct 18 ms 24300 KB Output is correct
30 Correct 18 ms 24044 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 23916 KB Output is correct
2 Correct 20 ms 23916 KB Output is correct
3 Correct 17 ms 23916 KB Output is correct
4 Correct 16 ms 23916 KB Output is correct
5 Correct 17 ms 23916 KB Output is correct
6 Correct 16 ms 23916 KB Output is correct
7 Correct 16 ms 23916 KB Output is correct
8 Correct 16 ms 23916 KB Output is correct
9 Correct 17 ms 23916 KB Output is correct
10 Correct 17 ms 23916 KB Output is correct
11 Correct 18 ms 23916 KB Output is correct
12 Correct 16 ms 23916 KB Output is correct
13 Correct 17 ms 23916 KB Output is correct
14 Correct 17 ms 23916 KB Output is correct
15 Correct 17 ms 23916 KB Output is correct
16 Correct 17 ms 23916 KB Output is correct
17 Correct 16 ms 23916 KB Output is correct
18 Correct 17 ms 23916 KB Output is correct
19 Correct 17 ms 23916 KB Output is correct
20 Correct 16 ms 23916 KB Output is correct
21 Correct 17 ms 23916 KB Output is correct
22 Correct 17 ms 23916 KB Output is correct
23 Correct 17 ms 23916 KB Output is correct
24 Correct 16 ms 23916 KB Output is correct
25 Correct 16 ms 23916 KB Output is correct
26 Correct 19 ms 24044 KB Output is correct
27 Correct 18 ms 24172 KB Output is correct
28 Correct 20 ms 24172 KB Output is correct
29 Correct 22 ms 24172 KB Output is correct
30 Correct 19 ms 24300 KB Output is correct
31 Correct 16 ms 23916 KB Output is correct
32 Correct 18 ms 24172 KB Output is correct
33 Correct 16 ms 23916 KB Output is correct
34 Correct 19 ms 24172 KB Output is correct
35 Correct 19 ms 24172 KB Output is correct
36 Correct 18 ms 24172 KB Output is correct
37 Correct 18 ms 24044 KB Output is correct
38 Correct 19 ms 23916 KB Output is correct
39 Correct 19 ms 24172 KB Output is correct
40 Correct 21 ms 24300 KB Output is correct
41 Correct 18 ms 24172 KB Output is correct
42 Correct 18 ms 24044 KB Output is correct
43 Correct 18 ms 24300 KB Output is correct
44 Correct 17 ms 23792 KB Output is correct
45 Correct 18 ms 24044 KB Output is correct
46 Correct 18 ms 24044 KB Output is correct
47 Correct 16 ms 23916 KB Output is correct
48 Correct 19 ms 24320 KB Output is correct
49 Correct 18 ms 24172 KB Output is correct
50 Correct 19 ms 24172 KB Output is correct
51 Correct 18 ms 24172 KB Output is correct
52 Correct 18 ms 24172 KB Output is correct
53 Correct 18 ms 24044 KB Output is correct
54 Correct 18 ms 24300 KB Output is correct
55 Correct 17 ms 23916 KB Output is correct
56 Correct 109 ms 31584 KB Output is correct
57 Correct 132 ms 36844 KB Output is correct
58 Correct 18 ms 24172 KB Output is correct
59 Correct 17 ms 23916 KB Output is correct
60 Correct 17 ms 23916 KB Output is correct
61 Correct 156 ms 32364 KB Output is correct
62 Correct 21 ms 24172 KB Output is correct
63 Correct 131 ms 38508 KB Output is correct
64 Correct 147 ms 35808 KB Output is correct
65 Correct 18 ms 24172 KB Output is correct
66 Correct 131 ms 31852 KB Output is correct
67 Correct 21 ms 24300 KB Output is correct
68 Correct 18 ms 24172 KB Output is correct
69 Correct 114 ms 31708 KB Output is correct
70 Correct 19 ms 24300 KB Output is correct
71 Correct 136 ms 36844 KB Output is correct
72 Correct 138 ms 38380 KB Output is correct
73 Correct 17 ms 23916 KB Output is correct
74 Correct 144 ms 38520 KB Output is correct
75 Correct 138 ms 37356 KB Output is correct
76 Correct 20 ms 24172 KB Output is correct
77 Correct 19 ms 24300 KB Output is correct
78 Correct 113 ms 31604 KB Output is correct
79 Correct 88 ms 32864 KB Output is correct
80 Correct 18 ms 24172 KB Output is correct
81 Correct 18 ms 24172 KB Output is correct
82 Correct 16 ms 24044 KB Output is correct
83 Correct 17 ms 23916 KB Output is correct
84 Correct 20 ms 24172 KB Output is correct
85 Correct 136 ms 32236 KB Output is correct
86 Correct 18 ms 24172 KB Output is correct
87 Correct 141 ms 33280 KB Output is correct
88 Correct 17 ms 23916 KB Output is correct
89 Correct 144 ms 32388 KB Output is correct
90 Correct 166 ms 32236 KB Output is correct
91 Correct 132 ms 34156 KB Output is correct
92 Correct 120 ms 33124 KB Output is correct
93 Correct 18 ms 24044 KB Output is correct
94 Correct 18 ms 23916 KB Output is correct
95 Correct 91 ms 33920 KB Output is correct
96 Correct 139 ms 37484 KB Output is correct
97 Correct 19 ms 24172 KB Output is correct
98 Correct 19 ms 23916 KB Output is correct
99 Correct 102 ms 31832 KB Output is correct
100 Correct 19 ms 24172 KB Output is correct
101 Correct 148 ms 32748 KB Output is correct
102 Correct 128 ms 36972 KB Output is correct
103 Correct 19 ms 24172 KB Output is correct
104 Correct 18 ms 24172 KB Output is correct
105 Correct 20 ms 24172 KB Output is correct
106 Correct 18 ms 24300 KB Output is correct
107 Correct 18 ms 24044 KB Output is correct
108 Correct 740 ms 65664 KB Output is correct
109 Correct 907 ms 104052 KB Output is correct
110 Correct 895 ms 104420 KB Output is correct
111 Correct 943 ms 95468 KB Output is correct
112 Correct 790 ms 82272 KB Output is correct
113 Correct 575 ms 75592 KB Output is correct
114 Correct 905 ms 90988 KB Output is correct
115 Correct 877 ms 96108 KB Output is correct
116 Correct 976 ms 70856 KB Output is correct
117 Correct 788 ms 76524 KB Output is correct
118 Correct 854 ms 69868 KB Output is correct
119 Correct 796 ms 76600 KB Output is correct
120 Correct 842 ms 91716 KB Output is correct
121 Correct 814 ms 76660 KB Output is correct
122 Correct 930 ms 83300 KB Output is correct
123 Correct 559 ms 79080 KB Output is correct
124 Correct 776 ms 67308 KB Output is correct