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Submission #939736

# Submission time Handle Problem Language Result Execution time Memory
939736 2024-03-06T17:20:05 Z Trisanu_Das Thousands Islands (IOI22_islands) C++17
24 / 100
 36 ms 8844 KB 
#include "islands.h"
#include<bits/stdc++.h>
 
using namespace std;
 
const int N=1e5+5;
const int M=2e5+5;
 
int n,m;
vector<pair<int,int>> adj[N];
vector<int> path;
bool vis[N],vis2[N];
 
int dfs(int u){
	if(vis2[u])return u;
	if(vis[u])return -1;
	vis[u]=vis2[u]=true;
	for(auto [v,id]:adj[u]){
		path.emplace_back(id);
		int res=dfs(v);
		if(res!=-1)return res;
		path.pop_back();
	}
	vis2[u]=false;
	return -1;
}
 
variant<bool, vector<int>> find_journey(int N,int M,vector<int> U,vector<int> V){
	n=N,m=M;
	for(int i=0;i<m;i+=2)adj[U[i]].emplace_back(V[i],i);
	int res=dfs(0);
	if(res==-1)return false;
	auto ans=path;
	vector<int> path2;
	stack<int> rev;
	int cur=0;
	bool ok=false;
	for(auto i:path){
		if(cur==res)ok=true;
		if(!ok){
			rev.emplace(i);
		}else{
			path2.emplace_back(i);
		}
		cur=V[i];
	}
	for(auto i:path2){
		ans.emplace_back(i+1);
	}
	reverse(path2.begin(),path2.end());
	for(auto i:path2){
		ans.emplace_back(i);
	}
	for(auto i:path2){
		ans.emplace_back(i+1);
	}
	while(!rev.empty()){
		ans.emplace_back(rev.top());
		rev.pop();
	}
	return ans;
}

Subtask #1
0.0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2652 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2652 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 21.0

# Verdict Execution time Memory Grader output
1 Partially correct 2 ms 2908 KB Output is partially correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Partially correct 1 ms 2652 KB Output is partially correct
5 Correct 1 ms 2904 KB Output is correct
6 Partially correct 1 ms 2652 KB Output is partially correct
7 Correct 1 ms 2652 KB Output is correct
8 Incorrect 1 ms 2904 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #4
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2816 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 23 ms 7532 KB Output is correct
4 Correct 29 ms 7788 KB Output is correct
5 Correct 3 ms 2908 KB Output is correct
6 Correct 2 ms 2908 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2812 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 2 ms 2908 KB Output is correct
11 Correct 2 ms 2868 KB Output is correct
12 Correct 2 ms 2824 KB Output is correct
13 Correct 2 ms 2908 KB Output is correct
14 Correct 2 ms 2908 KB Output is correct
15 Correct 2 ms 2908 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 1 ms 2648 KB Output is correct
18 Correct 1 ms 2824 KB Output is correct
19 Correct 2 ms 2652 KB Output is correct
20 Correct 36 ms 8080 KB Output is correct
21 Correct 25 ms 8048 KB Output is correct
22 Correct 1 ms 2908 KB Output is correct
23 Correct 2 ms 2652 KB Output is correct
24 Correct 1 ms 2648 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 2 ms 2904 KB Output is correct
27 Correct 31 ms 8276 KB Output is correct
28 Correct 33 ms 8252 KB Output is correct
29 Correct 1 ms 2652 KB Output is correct
30 Correct 27 ms 8796 KB Output is correct
31 Correct 2 ms 2648 KB Output is correct
32 Correct 25 ms 8284 KB Output is correct
33 Correct 27 ms 7760 KB Output is correct
34 Correct 14 ms 5636 KB Output is correct
35 Correct 2 ms 2908 KB Output is correct
36 Correct 23 ms 7516 KB Output is correct
37 Correct 26 ms 8516 KB Output is correct
38 Correct 1 ms 2652 KB Output is correct
39 Correct 21 ms 7260 KB Output is correct
40 Correct 2 ms 2908 KB Output is correct
41 Correct 28 ms 8844 KB Output is correct
42 Correct 26 ms 8256 KB Output is correct
43 Correct 1 ms 2652 KB Output is correct
44 Correct 2 ms 2776 KB Output is correct
45 Correct 2 ms 2824 KB Output is correct
46 Correct 14 ms 5212 KB Output is correct

Subtask #5
0.0 / 45.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2652 KB Output isn't correct
2 Halted 0 ms 0 KB -