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Submission #1065601

# Submission time Handle Problem Language Result Execution time Memory
1065601 2024-08-19T09:48:21 Z ReLice Longest Trip (IOI23_longesttrip) C++17
25 / 100
 865 ms 1500 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>
#define ll int
#define pb push_back
#define ins insert
#define fr first
#define sc second
#define vll vector<ll>
#define sz size()
using namespace std;

const ll N = 260;
const ll inf = 1e9 + 7;

vector<vll> g(N);
ll d[N],p[N];
bool vis[N];
ll n;

void dfs(ll v){
	vis[v] = 1;
	for(auto i : g[v]){
		if(d[i] != inf || (!vis[i] && d[i] < d[v] + 1))continue;
		
		p[i] = v;
		d[i] = d[v] + 1;
		
		if(d[i] >= (n+1)/2){vis[v] = 0;return;}
		
		dfs(i);
	}
	vis[v] = 0;
}

void cl(){
	for(ll i=0;i<N;i++){
		d[i] = inf;
		p[i] = i;
	}
}

pair<ll,ll> find(){
	ll mx = -1, x = 0;
	
	for(ll i=0;i<N;i++){
		if(d[i] != inf && d[i] > mx){
			mx = d[i];
			x = i;
		}
	}
	
	return {mx, x};
}

vector<int> longest_trip(int nn, int D){
	ll i,j;
	
	n=nn;
	
	for(i=0;i<n;i++) g[i].clear();
	for(i=0;i<n;i++){
		for(j=i+1;j<n;j++){
			if(are_connected({i},{j})){
				g[i].pb(j);
				g[j].pb(i);
			}
		}
	}
	
	ll rt = 0, ans = 0;
	
	for(i=0;i<n;i++){
		cl();
		
		d[i] = 1;
		dfs(i);
		
		auto [mx, x] = find();
		
		if(mx > ans){
			ans = mx;
			rt = i;
		}
		if(ans >= (n+1)/2)break;
	}
	
	auto [mx, x] = find();
	
	vll v;
	while(x != rt){
		v.pb(x);
		x = p[x];
	}
	v.pb(rt);
	
	return v;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #1
0.0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 20 ms 344 KB Output is correct
3 Correct 141 ms 344 KB Output is correct
4 Correct 387 ms 496 KB Output is correct
5 Correct 843 ms 1144 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 19 ms 344 KB Output is correct
8 Correct 143 ms 344 KB Output is correct
9 Correct 272 ms 592 KB Output is correct
10 Correct 842 ms 1116 KB Output is correct
11 Correct 818 ms 1120 KB Output is correct
12 Correct 843 ms 964 KB Output is correct
13 Correct 820 ms 1028 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 11 ms 344 KB Output is correct
16 Correct 36 ms 344 KB Output is correct
17 Correct 89 ms 344 KB Output is correct
18 Correct 151 ms 344 KB Output is correct
19 Correct 318 ms 712 KB Output is correct
20 Correct 319 ms 592 KB Output is correct
21 Correct 861 ms 728 KB Output is correct
22 Correct 858 ms 920 KB Output is correct
23 Correct 812 ms 736 KB Output is correct
24 Correct 830 ms 728 KB Output is correct
25 Correct 10 ms 344 KB Output is correct
26 Correct 9 ms 344 KB Output is correct
27 Correct 20 ms 344 KB Output is correct
28 Correct 21 ms 344 KB Output is correct
29 Correct 29 ms 344 KB Output is correct
30 Correct 186 ms 344 KB Output is correct
31 Correct 164 ms 600 KB Output is correct
32 Correct 201 ms 344 KB Output is correct
33 Correct 292 ms 480 KB Output is correct
34 Correct 308 ms 592 KB Output is correct
35 Correct 300 ms 600 KB Output is correct
36 Correct 815 ms 776 KB Output is correct
37 Correct 826 ms 1052 KB Output is correct
38 Correct 805 ms 960 KB Output is correct
39 Correct 862 ms 1100 KB Output is correct
40 Correct 840 ms 1500 KB Output is correct
41 Correct 857 ms 768 KB Output is correct
42 Correct 859 ms 620 KB Output is correct
43 Correct 798 ms 992 KB Output is correct
44 Correct 820 ms 1212 KB Output is correct
45 Correct 7 ms 344 KB Output is correct
46 Correct 12 ms 344 KB Output is correct
47 Correct 30 ms 344 KB Output is correct
48 Correct 29 ms 344 KB Output is correct
49 Correct 23 ms 344 KB Output is correct
50 Correct 192 ms 344 KB Output is correct
51 Correct 183 ms 600 KB Output is correct
52 Correct 206 ms 1368 KB Output is correct
53 Correct 317 ms 344 KB Output is correct
54 Correct 297 ms 728 KB Output is correct
55 Correct 292 ms 484 KB Output is correct
56 Correct 827 ms 936 KB Output is correct
57 Correct 864 ms 1436 KB Output is correct
58 Correct 789 ms 1332 KB Output is correct
59 Correct 801 ms 932 KB Output is correct
60 Correct 828 ms 1328 KB Output is correct
61 Correct 833 ms 776 KB Output is correct
62 Correct 817 ms 648 KB Output is correct
63 Correct 849 ms 1196 KB Output is correct
64 Correct 865 ms 944 KB Output is correct

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Incorrect
2 Halted 0 ms 0 KB -