oj.uz

Submission #765279

# Submission time Handle Problem Language Result Execution time Memory
765279 2023-06-24T10:14:37 Z Meloric Railway (BOI17_railway) C++14
100 / 100
 139 ms 40296 KB 
#include <bits/stdc++.h>
#define pb push_back
#define int int64_t
#define pii pair<int, int>
#define X first
#define Y second
#define all(x) (x).begin(),(x).end()
#define lb lower_bound
#define ub upper_bound

using namespace std;

const int inf = 1e18;

void p(auto A){
	for(auto e : A)cout << e << ' ';
	cout << '\n';
}
void solve(){
	int n, m, k; cin >> n >> m >> k;
	vector<vector<pii>> g(n);
	for(int i = 1; i< n; i++){
		int c, d; cin >> c >> d; c--; d--;
		g[c].pb({d, i});
		g[d].pb({c, i});
	}
	int lg = 25;
	vector<int>pre(n),pst(n);
	vector<vector<int>> up(n, vector<int>(lg));
	int t = 0;
	
	auto dfs = [&](auto&& self, int u, int p)->void{
		pre[u] = t++;
		up[u][0] = p;
		for(int i = 1; i< lg; i++)up[u][i] = up[up[u][i-1]][i-1];
		for(auto [v, _] : g[u])if(v!=p){
			self(self, v, u);
		}
		pst[u] = t++;
	};
	dfs(dfs, 0, 0);
	

	auto anc = [&](int a, int b)->bool{
		if(pre[a] <= pre[b] && pst[a] >= pst[b])return true;
		return false;
	};
	
	auto lca = [&](int a, int b)->int{
		if(anc(a, b))return a;
		if(anc(b, a))return b;
		for(int i = lg-1; i>= 0; i--)if(!anc(up[a][i], b))a=up[a][i];
		return up[a][0];
	};
	
	vector<int> A(n);
	for(int i = 0; i< m; i++){
		int c; cin >> c;
		vector<int> tmp;
		for(int i = 0; i< c; i++){
			int d; cin >> d; d--;
			tmp.pb(d);
		}

		sort(all(tmp), [&](int a, int b){return pre[a] < pre[b];});
		for(auto e : tmp)A[e]++;
		for(int j = 1; j< c; j++)A[lca(tmp[j], tmp[j-1])]--;
		A[lca(tmp.front(), tmp.back())]--;

	}
	
	vector<int> ans(n);
	auto dfs2 = [&](auto&& self, int u, int p)->void{
		for(auto [v, id] : g[u])if(v!=p){
			self(self, v, u);
			ans[id] = A[v];
			A[u]+=A[v];
		}
	};

	dfs2(dfs2, 0, 0);
	int num = 0;
	for(auto e : ans)if(e >= k)num++;
	cout << num << '\n';
	for(int i =1; i< n; i++)if(ans[i] >= k)cout << i << ' ';
}
		
	
signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	int t = 1;
	//cin >> t;
	while(t--)solve();
}

Compilation message

railway.cpp:15:8: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   15 | void p(auto A){
      |        ^~~~
railway.cpp: In lambda function:
railway.cpp:36:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   36 |   for(auto [v, _] : g[u])if(v!=p){
      |            ^
railway.cpp: In lambda function:
railway.cpp:74:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   74 |   for(auto [v, id] : g[u])if(v!=p){
      |            ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 5 ms 3668 KB Output is correct
3 Correct 5 ms 3684 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 7 ms 4012 KB Output is correct
7 Correct 6 ms 3784 KB Output is correct
8 Correct 5 ms 3668 KB Output is correct
9 Correct 5 ms 3680 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 5 ms 3668 KB Output is correct
3 Correct 5 ms 3684 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 7 ms 4012 KB Output is correct
7 Correct 6 ms 3784 KB Output is correct
8 Correct 5 ms 3668 KB Output is correct
9 Correct 5 ms 3680 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 15 ms 4056 KB Output is correct
16 Correct 15 ms 4076 KB Output is correct
17 Correct 16 ms 4052 KB Output is correct
18 Correct 6 ms 3924 KB Output is correct
19 Correct 6 ms 3728 KB Output is correct
20 Correct 22 ms 4160 KB Output is correct
21 Correct 17 ms 4180 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 5 ms 3676 KB Output is correct
24 Correct 5 ms 3668 KB Output is correct
25 Correct 1 ms 324 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 6 ms 3924 KB Output is correct
28 Correct 8 ms 3788 KB Output is correct
29 Correct 5 ms 3692 KB Output is correct
30 Correct 5 ms 3668 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 320 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 72 ms 39960 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 82 ms 39684 KB Output is correct
4 Correct 65 ms 39528 KB Output is correct
5 Correct 64 ms 39884 KB Output is correct
6 Correct 68 ms 40296 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 37604 KB Output is correct
2 Correct 103 ms 35536 KB Output is correct
3 Correct 117 ms 35352 KB Output is correct
4 Correct 95 ms 35400 KB Output is correct
5 Correct 110 ms 35332 KB Output is correct
6 Correct 88 ms 37724 KB Output is correct
7 Correct 110 ms 37580 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 37604 KB Output is correct
2 Correct 103 ms 35536 KB Output is correct
3 Correct 117 ms 35352 KB Output is correct
4 Correct 95 ms 35400 KB Output is correct
5 Correct 110 ms 35332 KB Output is correct
6 Correct 88 ms 37724 KB Output is correct
7 Correct 110 ms 37580 KB Output is correct
8 Correct 95 ms 37624 KB Output is correct
9 Correct 94 ms 37592 KB Output is correct
10 Correct 67 ms 39920 KB Output is correct
11 Correct 95 ms 39884 KB Output is correct
12 Correct 93 ms 34476 KB Output is correct
13 Correct 101 ms 34476 KB Output is correct
14 Correct 99 ms 35268 KB Output is correct
15 Correct 114 ms 35288 KB Output is correct
16 Correct 105 ms 35400 KB Output is correct
17 Correct 111 ms 35380 KB Output is correct
18 Correct 107 ms 35432 KB Output is correct
19 Correct 108 ms 35652 KB Output is correct
20 Correct 83 ms 37784 KB Output is correct
21 Correct 82 ms 37792 KB Output is correct
22 Correct 118 ms 37728 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 5 ms 3668 KB Output is correct
3 Correct 5 ms 3684 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 320 KB Output is correct
6 Correct 7 ms 4012 KB Output is correct
7 Correct 6 ms 3784 KB Output is correct
8 Correct 5 ms 3668 KB Output is correct
9 Correct 5 ms 3680 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 15 ms 4056 KB Output is correct
16 Correct 15 ms 4076 KB Output is correct
17 Correct 16 ms 4052 KB Output is correct
18 Correct 6 ms 3924 KB Output is correct
19 Correct 6 ms 3728 KB Output is correct
20 Correct 22 ms 4160 KB Output is correct
21 Correct 17 ms 4180 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 5 ms 3676 KB Output is correct
24 Correct 5 ms 3668 KB Output is correct
25 Correct 1 ms 324 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 6 ms 3924 KB Output is correct
28 Correct 8 ms 3788 KB Output is correct
29 Correct 5 ms 3692 KB Output is correct
30 Correct 5 ms 3668 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 320 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 72 ms 39960 KB Output is correct
37 Correct 1 ms 212 KB Output is correct
38 Correct 82 ms 39684 KB Output is correct
39 Correct 65 ms 39528 KB Output is correct
40 Correct 64 ms 39884 KB Output is correct
41 Correct 68 ms 40296 KB Output is correct
42 Correct 82 ms 37604 KB Output is correct
43 Correct 103 ms 35536 KB Output is correct
44 Correct 117 ms 35352 KB Output is correct
45 Correct 95 ms 35400 KB Output is correct
46 Correct 110 ms 35332 KB Output is correct
47 Correct 88 ms 37724 KB Output is correct
48 Correct 110 ms 37580 KB Output is correct
49 Correct 95 ms 37624 KB Output is correct
50 Correct 94 ms 37592 KB Output is correct
51 Correct 67 ms 39920 KB Output is correct
52 Correct 95 ms 39884 KB Output is correct
53 Correct 93 ms 34476 KB Output is correct
54 Correct 101 ms 34476 KB Output is correct
55 Correct 99 ms 35268 KB Output is correct
56 Correct 114 ms 35288 KB Output is correct
57 Correct 105 ms 35400 KB Output is correct
58 Correct 111 ms 35380 KB Output is correct
59 Correct 107 ms 35432 KB Output is correct
60 Correct 108 ms 35652 KB Output is correct
61 Correct 83 ms 37784 KB Output is correct
62 Correct 82 ms 37792 KB Output is correct
63 Correct 118 ms 37728 KB Output is correct
64 Correct 90 ms 37732 KB Output is correct
65 Correct 114 ms 35420 KB Output is correct
66 Correct 122 ms 35344 KB Output is correct
67 Correct 124 ms 35248 KB Output is correct
68 Correct 97 ms 34528 KB Output is correct
69 Correct 84 ms 34436 KB Output is correct
70 Correct 106 ms 37856 KB Output is correct
71 Correct 96 ms 37692 KB Output is correct
72 Correct 0 ms 212 KB Output is correct
73 Correct 6 ms 3668 KB Output is correct
74 Correct 5 ms 3664 KB Output is correct
75 Correct 1 ms 212 KB Output is correct
76 Correct 1 ms 212 KB Output is correct
77 Correct 6 ms 3924 KB Output is correct
78 Correct 5 ms 3788 KB Output is correct
79 Correct 7 ms 3668 KB Output is correct
80 Correct 5 ms 3668 KB Output is correct
81 Correct 1 ms 212 KB Output is correct
82 Correct 1 ms 212 KB Output is correct
83 Correct 1 ms 212 KB Output is correct
84 Correct 1 ms 316 KB Output is correct
85 Correct 1 ms 324 KB Output is correct
86 Correct 16 ms 4052 KB Output is correct
87 Correct 17 ms 4052 KB Output is correct
88 Correct 16 ms 4124 KB Output is correct
89 Correct 8 ms 3976 KB Output is correct
90 Correct 6 ms 3752 KB Output is correct
91 Correct 16 ms 4100 KB Output is correct
92 Correct 18 ms 4172 KB Output is correct
93 Correct 0 ms 212 KB Output is correct
94 Correct 68 ms 39972 KB Output is correct
95 Correct 86 ms 39740 KB Output is correct
96 Correct 76 ms 39492 KB Output is correct
97 Correct 65 ms 39936 KB Output is correct
98 Correct 70 ms 40256 KB Output is correct
99 Correct 120 ms 35392 KB Output is correct
100 Correct 139 ms 35372 KB Output is correct
101 Correct 115 ms 35384 KB Output is correct
102 Correct 108 ms 35600 KB Output is correct
103 Correct 85 ms 37708 KB Output is correct
104 Correct 90 ms 37788 KB Output is correct
105 Correct 82 ms 37576 KB Output is correct
106 Correct 92 ms 37716 KB Output is correct
107 Correct 101 ms 37580 KB Output is correct
108 Correct 75 ms 39928 KB Output is correct
109 Correct 74 ms 39904 KB Output is correct
110 Correct 100 ms 34468 KB Output is correct
111 Correct 107 ms 34476 KB Output is correct
112 Correct 121 ms 35268 KB Output is correct
113 Correct 105 ms 35300 KB Output is correct