oj.uz

Submission #741611

# Submission time Handle Problem Language Result Execution time Memory
741611 2023-05-14T13:12:46 Z vjudge1 Dreaming (IOI13_dreaming) C++17
0 / 100
 46 ms 14140 KB 
#include "dreaming.h"
#include <bits/stdc++.h>
#define ll long long
#define mp make_pair
#define pb push_back
using namespace std;
vector<pair<int,long long> > G[100100];
bool vis[100100];
ll ans, help = 0;
void dfs(int at, long long dist, vector<pair<int, long long> >& paths){
	vis[at] = true;
	paths.push_back(make_pair(at, dist));
	for(auto next : G[at]){
		if(!vis[next.first]){
			dfs(next.first, dist + next.second, paths);
		}
	}
}
void solve(int start){
	vector<pair<int, ll> > d, d2;
	dfs(start, 0, d);
	ll len1 = -1;
	int node1;
	for(auto t : d){
		if(len1 < t.second){
			len1 = t.second;
			node1 = t.first;
		}
	}
	d.clear();
	dfs(node1, 0, d);
	ll len2 = -1;
	int node2;
	map<int,ll> store;
	for(auto t : d){
		store[t.first] = t.second;
		if(len2 < t.second){
			len2 = t.second;
			node2 = t.first;
		}
	}
	help = max(help, len2);
	dfs(node2, 0, d2);
	for(auto t : d2){
		ans = min(ans, max(t.second, store[t.first]));
	}
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    memset(vis, false, sizeof vis);
    for(int i = 0; i < M; i++){
    	G[A[i]].pb(mp(B[i], T[i]));
    	G[B[i]].pb(mp(A[i], T[i]));
	}
	vector<ll> arr;
	for(int i = 0; i < N; i++){
		if(!vis[i]){
			ans = 2e9;
			solve(i);
			arr.pb(ans);			
		}
		else
			continue;
	}
	sort(arr.rbegin(), arr.rend());
	if(arr.size() == 1)	return max(arr[0], help);
	else if(arr.size() == 2)
		return max(help, arr[0] + arr[1] + L);
	else
		return max(max(arr[0] + arr[1] + L, arr[1] + arr[2] + 2 * L), help);
}

Compilation message

dreaming.cpp: In function 'void solve(int)':
dreaming.cpp:43:5: warning: 'node2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   43 |  dfs(node2, 0, d2);
      |  ~~~^~~~~~~~~~~~~~
dreaming.cpp:31:5: warning: 'node1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   31 |  dfs(node1, 0, d);
      |  ~~~^~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 46 ms 14140 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2772 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 46 ms 14140 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 26 ms 5732 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2772 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 46 ms 14140 KB Output isn't correct
2 Halted 0 ms 0 KB -