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Submission #942585

# Submission time Handle Problem Language Result Execution time Memory
942585 2024-03-10T23:02:14 Z MilosMilutinovic Longest Trip (IOI23_longesttrip) C++17
60 / 100
 1000 ms 1224 KB 
#include "longesttrip.h"
#include<bits/stdc++.h>

#define pb push_back

using namespace std;

bool con[305][305];
vector<int> res,cur;

void dfs(int x){
	cur.pb(x);
	if(cur.size()>res.size()) res=cur;
	for(int y=1;y=300;y++){
		if(con[x][y]){
			dfs(y);
		}
	}
	cur.pop_back();
}

mt19937 mrand(time(0));

vector<int> longest_trip(int n,int d){
	if(d==3){
		vector<int> ans;
		for(int i=0;i<n;i++) ans.pb(i);
		return ans;
	}
	if(d==2){
		for(int i=0;i<n;i++){
			for(int j=i+1;j<n;j++){
				con[i][j]=con[j][i]=are_connected({i},{j});
			}
		}
		res={};
		for(int i=0;i<n;i++){
			dfs(i);
		}
		return res;
	}
	vector<int> ord(n);
	iota(ord.begin(),ord.end(),0);
	shuffle(ord.begin(),ord.end(),mrand);
	vector<int> chn1(1,ord.back()),chn2;
	ord.pop_back();
	for(int i:ord){
		if(!chn1.empty()&&!chn2.empty()){
			bool ok1=are_connected({i},chn1),ok2=are_connected({i},chn2);
			if(ok1&&ok2){
				if(are_connected({i},{chn2[0]})) swap(chn1,chn2);
				swap(chn1[0],chn1.back());
				int l=0,r=chn2.size()-1,p=0;
				while(l<=r){
					int mid=(l+r)/2;
					vector<int> qv;
					for(int j=0;j<=mid;j++) qv.pb(chn2[j]);
					if(are_connected({i},qv)) p=mid,r=mid-1;
					else l=mid+1;
				}
				swap(chn2[p],chn2[0]);
				chn1.pb(i);
				for(int v:chn2) chn1.pb(v);
				chn2.clear();
				continue;
			}
			if(!ok1) chn2.pb(i);
			if(!ok2) chn1.pb(i);
			continue;
		}	
		bool ok=are_connected({i},chn1);
		if(!ok){
			chn2={i};
			continue;
		}
		if(are_connected({i},{chn1[0]})){
			reverse(chn1.begin(),chn1.end());
			chn1.pb(i);
			continue;
		}
		int l=0,r=(int)chn1.size()-1,p=0;
		while(l<=r){
			int mid=(l+r)/2;
			vector<int> qv;
			for(int j=mid;j<(int)chn1.size();j++) qv.pb(chn1[j]);
			if(are_connected({i},qv)) p=mid,l=mid+1; 
			else r=mid-1;
		}
		p=chn1[p];
		while(chn1.back()!=p){
			int x=chn1.back();
			chn1.pop_back();
			reverse(chn1.begin(),chn1.end());
			chn1.pb(x);
			reverse(chn1.begin(),chn1.end());
		}
		chn1.pb(i);
	}
	return chn1.size()>chn2.size()?chn1:chn2;
}

Compilation message

longesttrip.cpp: In function 'void dfs(int)':
longesttrip.cpp:14:15: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   14 |  for(int y=1;y=300;y++){
      |              ~^~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 6 ms 456 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct

Subtask #2
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3018 ms 344 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 10 ms 344 KB Output is correct
3 Correct 10 ms 344 KB Output is correct
4 Correct 13 ms 452 KB Output is correct
5 Correct 17 ms 456 KB Output is correct
6 Correct 11 ms 344 KB Output is correct
7 Correct 13 ms 344 KB Output is correct
8 Correct 10 ms 344 KB Output is correct
9 Correct 12 ms 444 KB Output is correct
10 Correct 17 ms 720 KB Output is correct
11 Correct 19 ms 976 KB Output is correct
12 Correct 18 ms 472 KB Output is correct
13 Correct 19 ms 472 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 8 ms 344 KB Output is correct
16 Correct 14 ms 344 KB Output is correct
17 Correct 15 ms 344 KB Output is correct
18 Correct 14 ms 344 KB Output is correct
19 Correct 18 ms 452 KB Output is correct
20 Correct 16 ms 600 KB Output is correct
21 Correct 24 ms 732 KB Output is correct
22 Correct 24 ms 884 KB Output is correct
23 Correct 23 ms 452 KB Output is correct
24 Correct 24 ms 984 KB Output is correct
25 Correct 8 ms 344 KB Output is correct
26 Correct 8 ms 344 KB Output is correct
27 Correct 10 ms 344 KB Output is correct
28 Correct 7 ms 344 KB Output is correct
29 Correct 8 ms 344 KB Output is correct
30 Correct 10 ms 444 KB Output is correct
31 Correct 10 ms 440 KB Output is correct
32 Correct 10 ms 344 KB Output is correct
33 Correct 12 ms 444 KB Output is correct
34 Correct 11 ms 444 KB Output is correct
35 Correct 11 ms 444 KB Output is correct
36 Correct 18 ms 716 KB Output is correct
37 Correct 17 ms 468 KB Output is correct
38 Correct 18 ms 876 KB Output is correct
39 Correct 19 ms 448 KB Output is correct
40 Correct 18 ms 704 KB Output is correct
41 Correct 17 ms 448 KB Output is correct
42 Correct 17 ms 700 KB Output is correct
43 Correct 17 ms 540 KB Output is correct
44 Correct 18 ms 704 KB Output is correct
45 Correct 10 ms 344 KB Output is correct
46 Correct 10 ms 344 KB Output is correct
47 Correct 13 ms 344 KB Output is correct
48 Correct 15 ms 344 KB Output is correct
49 Correct 16 ms 344 KB Output is correct
50 Correct 21 ms 448 KB Output is correct
51 Correct 18 ms 440 KB Output is correct
52 Correct 18 ms 444 KB Output is correct
53 Correct 22 ms 448 KB Output is correct
54 Correct 24 ms 600 KB Output is correct
55 Correct 23 ms 444 KB Output is correct
56 Correct 24 ms 980 KB Output is correct
57 Correct 26 ms 976 KB Output is correct
58 Correct 32 ms 732 KB Output is correct
59 Correct 30 ms 720 KB Output is correct
60 Correct 25 ms 472 KB Output is correct
61 Correct 24 ms 724 KB Output is correct
62 Correct 28 ms 956 KB Output is correct
63 Correct 27 ms 628 KB Output is correct
64 Correct 26 ms 476 KB Output is correct

Subtask #4
30.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 344 KB Output is correct
2 Correct 8 ms 344 KB Output is correct
3 Correct 10 ms 344 KB Output is correct
4 Correct 13 ms 452 KB Output is correct
5 Partially correct 17 ms 472 KB Output is partially correct
6 Correct 10 ms 344 KB Output is correct
7 Correct 10 ms 344 KB Output is correct
8 Correct 10 ms 344 KB Output is correct
9 Correct 12 ms 448 KB Output is correct
10 Partially correct 18 ms 476 KB Output is partially correct
11 Partially correct 19 ms 476 KB Output is partially correct
12 Partially correct 19 ms 476 KB Output is partially correct
13 Partially correct 18 ms 476 KB Output is partially correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 8 ms 344 KB Output is correct
16 Correct 21 ms 344 KB Output is correct
17 Correct 15 ms 344 KB Output is correct
18 Correct 15 ms 344 KB Output is correct
19 Correct 17 ms 448 KB Output is correct
20 Correct 17 ms 448 KB Output is correct
21 Correct 7 ms 344 KB Output is correct
22 Correct 7 ms 344 KB Output is correct
23 Correct 8 ms 344 KB Output is correct
24 Correct 9 ms 344 KB Output is correct
25 Correct 9 ms 344 KB Output is correct
26 Correct 10 ms 440 KB Output is correct
27 Correct 10 ms 440 KB Output is correct
28 Correct 10 ms 596 KB Output is correct
29 Correct 12 ms 444 KB Output is correct
30 Correct 14 ms 444 KB Output is correct
31 Correct 12 ms 444 KB Output is correct
32 Correct 10 ms 344 KB Output is correct
33 Correct 10 ms 344 KB Output is correct
34 Correct 14 ms 344 KB Output is correct
35 Correct 18 ms 344 KB Output is correct
36 Correct 16 ms 344 KB Output is correct
37 Partially correct 20 ms 452 KB Output is partially correct
38 Correct 16 ms 448 KB Output is correct
39 Correct 15 ms 444 KB Output is correct
40 Partially correct 20 ms 448 KB Output is partially correct
41 Partially correct 23 ms 448 KB Output is partially correct
42 Partially correct 20 ms 600 KB Output is partially correct
43 Partially correct 21 ms 728 KB Output is partially correct
44 Partially correct 23 ms 732 KB Output is partially correct
45 Partially correct 23 ms 732 KB Output is partially correct
46 Partially correct 22 ms 976 KB Output is partially correct
47 Partially correct 20 ms 472 KB Output is partially correct
48 Partially correct 17 ms 976 KB Output is partially correct
49 Partially correct 17 ms 720 KB Output is partially correct
50 Partially correct 19 ms 768 KB Output is partially correct
51 Partially correct 17 ms 448 KB Output is partially correct
52 Partially correct 18 ms 452 KB Output is partially correct
53 Partially correct 18 ms 448 KB Output is partially correct
54 Partially correct 17 ms 452 KB Output is partially correct
55 Partially correct 19 ms 452 KB Output is partially correct
56 Partially correct 20 ms 472 KB Output is partially correct
57 Partially correct 17 ms 468 KB Output is partially correct
58 Partially correct 18 ms 456 KB Output is partially correct
59 Partially correct 18 ms 448 KB Output is partially correct
60 Partially correct 19 ms 452 KB Output is partially correct
61 Partially correct 17 ms 456 KB Output is partially correct
62 Partially correct 35 ms 728 KB Output is partially correct
63 Partially correct 34 ms 724 KB Output is partially correct
64 Partially correct 24 ms 720 KB Output is partially correct
65 Partially correct 27 ms 1224 KB Output is partially correct
66 Partially correct 28 ms 712 KB Output is partially correct
67 Partially correct 29 ms 700 KB Output is partially correct
68 Partially correct 29 ms 968 KB Output is partially correct
69 Partially correct 23 ms 468 KB Output is partially correct
70 Partially correct 24 ms 716 KB Output is partially correct
71 Partially correct 31 ms 472 KB Output is partially correct
72 Partially correct 35 ms 976 KB Output is partially correct
73 Partially correct 24 ms 700 KB Output is partially correct
74 Partially correct 30 ms 708 KB Output is partially correct
75 Partially correct 24 ms 472 KB Output is partially correct
76 Partially correct 26 ms 972 KB Output is partially correct
77 Partially correct 41 ms 968 KB Output is partially correct
78 Partially correct 33 ms 724 KB Output is partially correct
79 Partially correct 27 ms 472 KB Output is partially correct
80 Partially correct 27 ms 712 KB Output is partially correct
81 Partially correct 26 ms 724 KB Output is partially correct
82 Partially correct 22 ms 468 KB Output is partially correct