Submission #890040

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
890040	2023-12-20T11:32:25 Z	vjudge1	Tourism (JOI23_tourism)	C++17	10 / 100	60 ms	1108 KB

tourism

#include <bits/stdc++.h>
 
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define int long long
#define rnd(l, r) uniform_int_distribution<int>(l, r)(rng)
 
using namespace std;

void fp(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);} 
int pow(int a,int b,int m){int ans=1;while(b){if(b&1){ans=(ans*a)%m;}b>>=1;a=(a*a)%m;}return ans;}
int binpow(int a,int b){int ans=1;while(b){if(b&1){ans=(ans*a);}b>>=1;a=(a*a);}return ans;}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
 
const int N = 2e3 + 100, inf = 1e18, M = 4e3;

int parn[N];

vector <int> g[N];


void dfs(int v, int p){
	parn[v] = p;
	for(auto to : g[v]){
		if(to != p){
			dfs(to, v);
		}
	}
}

main(){
	iostream::sync_with_stdio(false);	
    cin.tie(nullptr);
    cout.tie(nullptr);
	int n, m, q;
	cin >> n >> m >> q;
	for(int i = 0; i < n - 1; i++){
		int a, b;
		cin >> a >> b;
		g[a].pb(b);
		g[b].pb(a);
	}
	vector <int> c(m + 1);
	for(int i = 1; i <= m; i++){
		cin >> c[i];
	}
	for(int i = 0; i < q; i++){
		int l, r;
		cin >> l >> r;
		dfs(c[l], c[l]);
		vector <int> vis(n + 1);
		int ans = 0;
		for(int j = l; j <= r; j++){
			int x = c[j];
			
			while(!vis[x]){
				vis[x] = 1;
				ans++;
				x = parn[x];
			}
		}
		cout << ans << endl;
	}
}

/*
	Before implementing the problem:
	
	Do I understand the problem correctly?
	Which places are tricky? What do I need to remember to implement them correctly?
	Which place is the heaviest by implementation? Can I do it simpler?
	Which place is the slowest? Where do I need to be careful about constant factors and where I can choose slower but simpler implementation?
	----------------------------------
	If not AC:
 
	Did you remember to do everything to handle the tricky places you thought about before?
	Is the solution correct?
	Do I understand the problem correctly?
	----------------------------------
	If you have a test on which the solution gives wrong answer:
 
	Is the solution doing what it was supposed to do?
	Is the problem in the code or in the idea?
*/

Compilation message

tourism.cpp:34:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   34 | main(){
      | ^~~~
tourism.cpp: In function 'void fp(std::string)':
tourism.cpp:13:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | void fp(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tourism.cpp:13:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | void fp(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	516 KB	Output is correct
5	Correct	1 ms	512 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	2 ms	348 KB	Output is correct
10	Correct	2 ms	348 KB	Output is correct
11	Correct	2 ms	348 KB	Output is correct
12	Correct	2 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	2 ms	348 KB	Output is correct
16	Correct	2 ms	348 KB	Output is correct
17	Correct	2 ms	348 KB	Output is correct
18	Correct	2 ms	348 KB	Output is correct
19	Correct	2 ms	348 KB	Output is correct
20	Correct	2 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	1 ms	348 KB	Output is correct
23	Correct	1 ms	344 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	1 ms	348 KB	Output is correct
26	Correct	1 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	1 ms	344 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct

Subtask #2
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	516 KB	Output is correct
5	Correct	1 ms	512 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	2 ms	348 KB	Output is correct
10	Correct	2 ms	348 KB	Output is correct
11	Correct	2 ms	348 KB	Output is correct
12	Correct	2 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	2 ms	348 KB	Output is correct
16	Correct	2 ms	348 KB	Output is correct
17	Correct	2 ms	348 KB	Output is correct
18	Correct	2 ms	348 KB	Output is correct
19	Correct	2 ms	348 KB	Output is correct
20	Correct	2 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	1 ms	348 KB	Output is correct
23	Correct	1 ms	344 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	1 ms	348 KB	Output is correct
26	Correct	1 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	1 ms	344 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct
30	Correct	27 ms	604 KB	Output is correct
31	Correct	34 ms	604 KB	Output is correct
32	Correct	56 ms	756 KB	Output is correct
33	Correct	57 ms	600 KB	Output is correct
34	Correct	56 ms	604 KB	Output is correct
35	Correct	53 ms	604 KB	Output is correct
36	Correct	60 ms	860 KB	Output is correct
37	Correct	54 ms	600 KB	Output is correct
38	Correct	47 ms	604 KB	Output is correct
39	Correct	43 ms	716 KB	Output is correct
40	Correct	48 ms	724 KB	Output is correct
41	Correct	55 ms	600 KB	Output is correct
42	Correct	47 ms	604 KB	Output is correct
43	Correct	45 ms	716 KB	Output is correct
44	Correct	44 ms	688 KB	Output is correct
45	Correct	45 ms	604 KB	Output is correct
46	Correct	44 ms	600 KB	Output is correct
47	Correct	48 ms	864 KB	Output is correct
48	Correct	46 ms	600 KB	Output is correct
49	Correct	46 ms	672 KB	Output is correct
50	Correct	20 ms	600 KB	Output is correct
51	Correct	24 ms	604 KB	Output is correct
52	Correct	21 ms	684 KB	Output is correct
53	Correct	21 ms	604 KB	Output is correct
54	Correct	26 ms	1108 KB	Output is correct
55	Correct	21 ms	604 KB	Output is correct
56	Correct	4 ms	344 KB	Output is correct
57	Correct	27 ms	520 KB	Output is correct
58	Correct	41 ms	600 KB	Output is correct

Subtask #3
0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	4 ms	348 KB	Output is correct
4	Runtime error	1 ms	860 KB	Execution killed with signal 11
5	Halted	0 ms	0 KB	-

Subtask #4
0 / 18.0

#	Verdict	Memory	Grader output
1	Correct	348 KB	Output is correct
2	Runtime error	604 KB	Execution killed with signal 11
3	Halted	0 KB	-

Subtask #5
0 / 24.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	4 ms	348 KB	Output is correct
4	Runtime error	1 ms	860 KB	Execution killed with signal 11
5	Halted	0 ms	0 KB	-

Subtask #6
0 / 41.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	516 KB	Output is correct
5	Correct	1 ms	512 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	2 ms	348 KB	Output is correct
10	Correct	2 ms	348 KB	Output is correct
11	Correct	2 ms	348 KB	Output is correct
12	Correct	2 ms	344 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	2 ms	348 KB	Output is correct
16	Correct	2 ms	348 KB	Output is correct
17	Correct	2 ms	348 KB	Output is correct
18	Correct	2 ms	348 KB	Output is correct
19	Correct	2 ms	348 KB	Output is correct
20	Correct	2 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	1 ms	348 KB	Output is correct
23	Correct	1 ms	344 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	1 ms	348 KB	Output is correct
26	Correct	1 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	1 ms	344 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct
30	Correct	27 ms	604 KB	Output is correct
31	Correct	34 ms	604 KB	Output is correct
32	Correct	56 ms	756 KB	Output is correct
33	Correct	57 ms	600 KB	Output is correct
34	Correct	56 ms	604 KB	Output is correct
35	Correct	53 ms	604 KB	Output is correct
36	Correct	60 ms	860 KB	Output is correct
37	Correct	54 ms	600 KB	Output is correct
38	Correct	47 ms	604 KB	Output is correct
39	Correct	43 ms	716 KB	Output is correct
40	Correct	48 ms	724 KB	Output is correct
41	Correct	55 ms	600 KB	Output is correct
42	Correct	47 ms	604 KB	Output is correct
43	Correct	45 ms	716 KB	Output is correct
44	Correct	44 ms	688 KB	Output is correct
45	Correct	45 ms	604 KB	Output is correct
46	Correct	44 ms	600 KB	Output is correct
47	Correct	48 ms	864 KB	Output is correct
48	Correct	46 ms	600 KB	Output is correct
49	Correct	46 ms	672 KB	Output is correct
50	Correct	20 ms	600 KB	Output is correct
51	Correct	24 ms	604 KB	Output is correct
52	Correct	21 ms	684 KB	Output is correct
53	Correct	21 ms	604 KB	Output is correct
54	Correct	26 ms	1108 KB	Output is correct
55	Correct	21 ms	604 KB	Output is correct
56	Correct	4 ms	344 KB	Output is correct
57	Correct	27 ms	520 KB	Output is correct
58	Correct	41 ms	600 KB	Output is correct
59	Correct	0 ms	348 KB	Output is correct
60	Correct	1 ms	348 KB	Output is correct
61	Correct	4 ms	348 KB	Output is correct
62	Runtime error	1 ms	860 KB	Execution killed with signal 11
63	Halted	0 ms	0 KB	-

Submission #890040

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 5.0 / 5.0

Subtask #3 0 / 7.0

Subtask #4 0 / 18.0

Subtask #5 0 / 24.0

Subtask #6 0 / 41.0

Subtask #1
5.0 / 5.0

Subtask #2
5.0 / 5.0

Subtask #3
0 / 7.0

Subtask #4
0 / 18.0

Subtask #5
0 / 24.0

Subtask #6
0 / 41.0