oj.uz

Submission #382380

# Submission time Handle Problem Language Result Execution time Memory
382380 2021-03-27T08:09:57 Z ritul_kr_singh Birthday gift (IZhO18_treearray) C++17
100 / 100
 1166 ms 101484 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define sp << " " <<
#define nl << "\n"

vector<vector<int>> g;
vector<array<int, 19>> p;
vector<int> t0, t1;
int dfsTimer = 0;

void dfs(int u, int parent){
	t0[u] = dfsTimer++;
	p[u][0] = parent;
	for(int i=1; i<19; ++i) p[u][i] = p[p[u][i-1]][i-1];
	for(int v : g[u]) if(v != parent) dfs(v, u);
	t1[u] = dfsTimer++;
}

bool isAncestor(int u, int v){
	return t0[u]<=t0[v] and t1[v]<=t1[u];
}

int lca(int u, int v){
	if(isAncestor(u, v)) return u;
	if(isAncestor(v, u)) return v;
	for(int i=18; i>=0; --i)
		while(u and !isAncestor(p[u][i], v)) u = p[u][i];
	return p[u][0];
}

signed main(){
	cin.tie(0)->sync_with_stdio(0);
	int n, m, q, x, y, type; cin >> n >> m >> q;
	g.resize(n), p.resize(n), t0.resize(n), t1.resize(n);
	for(int i=1; i<n; ++i){
		cin >> x >> y;
		--x, --y;
		g[x].push_back(y);
		g[y].push_back(x);
	}
	dfs(0, 0);
	// for(int i=0; i<n; ++i)
	// 	for(int j=i; j<n; ++j)
	// 		cout << i+1 sp j+1 sp lca(i, j)+1 nl;
	vector<int> a(m);
	vector<set<int>> pairs(n), pos(n);
	for(int i=0; i<m; ++i){
		cin >> a[i]; --a[i];
		pos[a[i]].insert(i);
		if(i) pairs[lca(a[i], a[i-1])].insert(i-1);
	}

	while(q--){
		cin >> type >> x >> y;
		--x, --y;
		if(type==1){
			if(x+1<m){
				pairs[lca(a[x], a[x+1])].erase(x);
				pairs[lca(y, a[x+1])].insert(x);
			}
			if(x){
				pairs[lca(a[x], a[x-1])].erase(x-1);
				pairs[lca(y, a[x-1])].insert(x-1);
			}
			pos[a[x]].erase(x);
			pos[y].insert(x);
			a[x] = y;
		}else{
			int v; cin >> v; --v;
			auto f = pos[v].lower_bound(x);
			if(f!=pos[v].end() and *f<=y){
				cout << *f+1 sp *f+1 nl;
				continue;
			}
			f = pairs[v].lower_bound(x);
			if(f!=pairs[v].end() and *f<y) cout << *f+1 sp *f+2 nl;
			else cout << -1 sp -1 nl;
		}
	}

}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB n=5
2 Correct 2 ms 364 KB n=100
3 Correct 1 ms 364 KB n=100
4 Correct 1 ms 364 KB n=100
5 Correct 1 ms 364 KB n=100
6 Correct 1 ms 364 KB n=100
7 Correct 1 ms 364 KB n=100
8 Correct 1 ms 364 KB n=100
9 Correct 1 ms 364 KB n=100
10 Correct 1 ms 364 KB n=100
11 Correct 2 ms 364 KB n=100
12 Correct 1 ms 364 KB n=100
13 Correct 1 ms 364 KB n=100
14 Correct 1 ms 364 KB n=100
15 Correct 1 ms 364 KB n=100
16 Correct 2 ms 364 KB n=100
17 Correct 1 ms 364 KB n=100
18 Correct 1 ms 364 KB n=100
19 Correct 1 ms 364 KB n=100
20 Correct 1 ms 364 KB n=100
21 Correct 1 ms 364 KB n=100
22 Correct 1 ms 364 KB n=100
23 Correct 1 ms 492 KB n=100
24 Correct 1 ms 364 KB n=100
25 Correct 2 ms 364 KB n=100
26 Correct 1 ms 364 KB n=12
27 Correct 1 ms 364 KB n=100

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB n=5
2 Correct 2 ms 364 KB n=100
3 Correct 1 ms 364 KB n=100
4 Correct 1 ms 364 KB n=100
5 Correct 1 ms 364 KB n=100
6 Correct 1 ms 364 KB n=100
7 Correct 1 ms 364 KB n=100
8 Correct 1 ms 364 KB n=100
9 Correct 1 ms 364 KB n=100
10 Correct 1 ms 364 KB n=100
11 Correct 2 ms 364 KB n=100
12 Correct 1 ms 364 KB n=100
13 Correct 1 ms 364 KB n=100
14 Correct 1 ms 364 KB n=100
15 Correct 1 ms 364 KB n=100
16 Correct 2 ms 364 KB n=100
17 Correct 1 ms 364 KB n=100
18 Correct 1 ms 364 KB n=100
19 Correct 1 ms 364 KB n=100
20 Correct 1 ms 364 KB n=100
21 Correct 1 ms 364 KB n=100
22 Correct 1 ms 364 KB n=100
23 Correct 1 ms 492 KB n=100
24 Correct 1 ms 364 KB n=100
25 Correct 2 ms 364 KB n=100
26 Correct 1 ms 364 KB n=12
27 Correct 1 ms 364 KB n=100
28 Correct 2 ms 620 KB n=500
29 Correct 2 ms 620 KB n=500
30 Correct 2 ms 620 KB n=500
31 Correct 2 ms 620 KB n=500
32 Correct 2 ms 620 KB n=500
33 Correct 2 ms 620 KB n=500
34 Correct 2 ms 620 KB n=500
35 Correct 2 ms 620 KB n=500
36 Correct 2 ms 620 KB n=500
37 Correct 2 ms 640 KB n=500
38 Correct 2 ms 620 KB n=500
39 Correct 2 ms 620 KB n=500
40 Correct 2 ms 640 KB n=500
41 Correct 2 ms 620 KB n=500
42 Correct 2 ms 620 KB n=500
43 Correct 2 ms 620 KB n=500
44 Correct 2 ms 620 KB n=500
45 Correct 2 ms 620 KB n=500
46 Correct 2 ms 620 KB n=500
47 Correct 2 ms 620 KB n=500
48 Correct 2 ms 620 KB n=500
49 Correct 2 ms 620 KB n=500
50 Correct 2 ms 620 KB n=500
51 Correct 2 ms 620 KB n=500
52 Correct 2 ms 620 KB n=500
53 Correct 2 ms 620 KB n=500
54 Correct 2 ms 620 KB n=500
55 Correct 2 ms 512 KB n=278
56 Correct 3 ms 620 KB n=500
57 Correct 2 ms 620 KB n=500
58 Correct 2 ms 620 KB n=500

Subtask #3
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB n=5
2 Correct 2 ms 364 KB n=100
3 Correct 1 ms 364 KB n=100
4 Correct 1 ms 364 KB n=100
5 Correct 1 ms 364 KB n=100
6 Correct 1 ms 364 KB n=100
7 Correct 1 ms 364 KB n=100
8 Correct 1 ms 364 KB n=100
9 Correct 1 ms 364 KB n=100
10 Correct 1 ms 364 KB n=100
11 Correct 2 ms 364 KB n=100
12 Correct 1 ms 364 KB n=100
13 Correct 1 ms 364 KB n=100
14 Correct 1 ms 364 KB n=100
15 Correct 1 ms 364 KB n=100
16 Correct 2 ms 364 KB n=100
17 Correct 1 ms 364 KB n=100
18 Correct 1 ms 364 KB n=100
19 Correct 1 ms 364 KB n=100
20 Correct 1 ms 364 KB n=100
21 Correct 1 ms 364 KB n=100
22 Correct 1 ms 364 KB n=100
23 Correct 1 ms 492 KB n=100
24 Correct 1 ms 364 KB n=100
25 Correct 2 ms 364 KB n=100
26 Correct 1 ms 364 KB n=12
27 Correct 1 ms 364 KB n=100
28 Correct 2 ms 620 KB n=500
29 Correct 2 ms 620 KB n=500
30 Correct 2 ms 620 KB n=500
31 Correct 2 ms 620 KB n=500
32 Correct 2 ms 620 KB n=500
33 Correct 2 ms 620 KB n=500
34 Correct 2 ms 620 KB n=500
35 Correct 2 ms 620 KB n=500
36 Correct 2 ms 620 KB n=500
37 Correct 2 ms 640 KB n=500
38 Correct 2 ms 620 KB n=500
39 Correct 2 ms 620 KB n=500
40 Correct 2 ms 640 KB n=500
41 Correct 2 ms 620 KB n=500
42 Correct 2 ms 620 KB n=500
43 Correct 2 ms 620 KB n=500
44 Correct 2 ms 620 KB n=500
45 Correct 2 ms 620 KB n=500
46 Correct 2 ms 620 KB n=500
47 Correct 2 ms 620 KB n=500
48 Correct 2 ms 620 KB n=500
49 Correct 2 ms 620 KB n=500
50 Correct 2 ms 620 KB n=500
51 Correct 2 ms 620 KB n=500
52 Correct 2 ms 620 KB n=500
53 Correct 2 ms 620 KB n=500
54 Correct 2 ms 620 KB n=500
55 Correct 2 ms 512 KB n=278
56 Correct 3 ms 620 KB n=500
57 Correct 2 ms 620 KB n=500
58 Correct 2 ms 620 KB n=500
59 Correct 5 ms 1260 KB n=2000
60 Correct 4 ms 1260 KB n=2000
61 Correct 5 ms 1260 KB n=2000
62 Correct 6 ms 1260 KB n=2000
63 Correct 6 ms 1260 KB n=2000
64 Correct 5 ms 1260 KB n=2000
65 Correct 5 ms 1260 KB n=2000
66 Correct 4 ms 1260 KB n=2000
67 Correct 5 ms 1260 KB n=2000
68 Correct 4 ms 1260 KB n=2000
69 Correct 4 ms 1260 KB n=2000
70 Correct 4 ms 1260 KB n=2000
71 Correct 4 ms 1260 KB n=2000
72 Correct 4 ms 1260 KB n=2000
73 Correct 4 ms 1260 KB n=2000
74 Correct 4 ms 1132 KB n=1844
75 Correct 4 ms 1260 KB n=2000
76 Correct 5 ms 1260 KB n=2000
77 Correct 5 ms 1260 KB n=2000
78 Correct 5 ms 1260 KB n=2000
79 Correct 5 ms 1260 KB n=2000
80 Correct 5 ms 1260 KB n=2000
81 Correct 5 ms 1260 KB n=2000
82 Correct 5 ms 1260 KB n=2000
83 Correct 5 ms 1260 KB n=2000
84 Correct 5 ms 1260 KB n=2000
85 Correct 5 ms 1260 KB n=2000
86 Correct 5 ms 1260 KB n=2000
87 Correct 5 ms 1260 KB n=2000
88 Correct 4 ms 1260 KB n=2000
89 Correct 4 ms 1260 KB n=2000
90 Correct 4 ms 1260 KB n=2000
91 Correct 4 ms 1260 KB n=2000

Subtask #4
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB n=5
2 Correct 2 ms 364 KB n=100
3 Correct 1 ms 364 KB n=100
4 Correct 1 ms 364 KB n=100
5 Correct 1 ms 364 KB n=100
6 Correct 1 ms 364 KB n=100
7 Correct 1 ms 364 KB n=100
8 Correct 1 ms 364 KB n=100
9 Correct 1 ms 364 KB n=100
10 Correct 1 ms 364 KB n=100
11 Correct 2 ms 364 KB n=100
12 Correct 1 ms 364 KB n=100
13 Correct 1 ms 364 KB n=100
14 Correct 1 ms 364 KB n=100
15 Correct 1 ms 364 KB n=100
16 Correct 2 ms 364 KB n=100
17 Correct 1 ms 364 KB n=100
18 Correct 1 ms 364 KB n=100
19 Correct 1 ms 364 KB n=100
20 Correct 1 ms 364 KB n=100
21 Correct 1 ms 364 KB n=100
22 Correct 1 ms 364 KB n=100
23 Correct 1 ms 492 KB n=100
24 Correct 1 ms 364 KB n=100
25 Correct 2 ms 364 KB n=100
26 Correct 1 ms 364 KB n=12
27 Correct 1 ms 364 KB n=100
28 Correct 2 ms 620 KB n=500
29 Correct 2 ms 620 KB n=500
30 Correct 2 ms 620 KB n=500
31 Correct 2 ms 620 KB n=500
32 Correct 2 ms 620 KB n=500
33 Correct 2 ms 620 KB n=500
34 Correct 2 ms 620 KB n=500
35 Correct 2 ms 620 KB n=500
36 Correct 2 ms 620 KB n=500
37 Correct 2 ms 640 KB n=500
38 Correct 2 ms 620 KB n=500
39 Correct 2 ms 620 KB n=500
40 Correct 2 ms 640 KB n=500
41 Correct 2 ms 620 KB n=500
42 Correct 2 ms 620 KB n=500
43 Correct 2 ms 620 KB n=500
44 Correct 2 ms 620 KB n=500
45 Correct 2 ms 620 KB n=500
46 Correct 2 ms 620 KB n=500
47 Correct 2 ms 620 KB n=500
48 Correct 2 ms 620 KB n=500
49 Correct 2 ms 620 KB n=500
50 Correct 2 ms 620 KB n=500
51 Correct 2 ms 620 KB n=500
52 Correct 2 ms 620 KB n=500
53 Correct 2 ms 620 KB n=500
54 Correct 2 ms 620 KB n=500
55 Correct 2 ms 512 KB n=278
56 Correct 3 ms 620 KB n=500
57 Correct 2 ms 620 KB n=500
58 Correct 2 ms 620 KB n=500
59 Correct 5 ms 1260 KB n=2000
60 Correct 4 ms 1260 KB n=2000
61 Correct 5 ms 1260 KB n=2000
62 Correct 6 ms 1260 KB n=2000
63 Correct 6 ms 1260 KB n=2000
64 Correct 5 ms 1260 KB n=2000
65 Correct 5 ms 1260 KB n=2000
66 Correct 4 ms 1260 KB n=2000
67 Correct 5 ms 1260 KB n=2000
68 Correct 4 ms 1260 KB n=2000
69 Correct 4 ms 1260 KB n=2000
70 Correct 4 ms 1260 KB n=2000
71 Correct 4 ms 1260 KB n=2000
72 Correct 4 ms 1260 KB n=2000
73 Correct 4 ms 1260 KB n=2000
74 Correct 4 ms 1132 KB n=1844
75 Correct 4 ms 1260 KB n=2000
76 Correct 5 ms 1260 KB n=2000
77 Correct 5 ms 1260 KB n=2000
78 Correct 5 ms 1260 KB n=2000
79 Correct 5 ms 1260 KB n=2000
80 Correct 5 ms 1260 KB n=2000
81 Correct 5 ms 1260 KB n=2000
82 Correct 5 ms 1260 KB n=2000
83 Correct 5 ms 1260 KB n=2000
84 Correct 5 ms 1260 KB n=2000
85 Correct 5 ms 1260 KB n=2000
86 Correct 5 ms 1260 KB n=2000
87 Correct 5 ms 1260 KB n=2000
88 Correct 4 ms 1260 KB n=2000
89 Correct 4 ms 1260 KB n=2000
90 Correct 4 ms 1260 KB n=2000
91 Correct 4 ms 1260 KB n=2000
92 Correct 818 ms 92648 KB n=200000
93 Correct 903 ms 97668 KB n=200000
94 Correct 714 ms 100536 KB n=200000
95 Correct 772 ms 92508 KB n=200000
96 Correct 763 ms 92508 KB n=200000
97 Correct 997 ms 96748 KB n=200000
98 Correct 840 ms 92764 KB n=200000
99 Correct 978 ms 93216 KB n=200000
100 Correct 842 ms 92572 KB n=200000
101 Correct 618 ms 101484 KB n=200000
102 Correct 525 ms 93916 KB n=200000
103 Correct 507 ms 93932 KB n=200000
104 Correct 529 ms 94060 KB n=200000
105 Correct 523 ms 94316 KB n=200000
106 Correct 523 ms 94316 KB n=200000
107 Correct 525 ms 94212 KB n=200000
108 Correct 910 ms 92780 KB n=200000
109 Correct 943 ms 92908 KB n=200000
110 Correct 860 ms 92844 KB n=200000
111 Correct 801 ms 91868 KB n=200000
112 Correct 688 ms 100716 KB n=200000
113 Correct 970 ms 96876 KB n=200000
114 Correct 783 ms 91996 KB n=200000
115 Correct 1166 ms 94700 KB n=200000
116 Correct 746 ms 92636 KB n=200000
117 Correct 677 ms 100844 KB n=200000
118 Correct 1031 ms 95596 KB n=200000
119 Correct 739 ms 92776 KB n=200000
120 Correct 583 ms 100460 KB n=200000
121 Correct 573 ms 100460 KB n=200000
122 Correct 605 ms 100588 KB n=200000
123 Correct 539 ms 94240 KB n=200000
124 Correct 190 ms 20716 KB n=25264