oj.uz

답안 #920284

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
920284 2024-02-02T11:53:00 Z Arp 꿈 (IOI13_dreaming) C++17
0 / 100
 53 ms 17488 KB 
#include<bits/stdc++.h>
#include "dreaming.h"
using namespace std;

using i64 = int;
const int N = 1e5;
vector<pair<int,int>> adj[N];
i64 down[N],up[N];
bool vis[N];
i64 mini = 1e9;
void dfs(int u){
  vis[u] = true;
  vector<i64> all;
  i64 maxi = -1e9;
  for(auto [v,w] : adj[u]){
    if(vis[v]) continue;
    down[v] = down[u] + w;
    dfs(v);  
    up[u] = max(up[u],up[v] + w);
  }
  for(auto [v,w] : adj[u]){
    up[v] = max(up[v],maxi + w);
    maxi = max(maxi,up[v] + w);
  }
  maxi = -1e9;
  reverse(adj[u].begin(),adj[u].end());
  for(auto [v,w] : adj[u]){
    up[v] = max(up[v],maxi + w);
    maxi = max(maxi,up[v] + w);
  }
}

void dfs2(int u,int p){
  for(auto [v,w] : adj[u]){
    if(v == p) continue;
    dfs2(v,u);  
  }
  mini = min(mini,max(down[u],up[u]));
}

int travelTime(int N,int M,int L,int A[],int B[],int T[]){
  for(int i = 0;i<N;i++){
    up[i] = down[i] = 0;
    vis[i] = false;
  }
  for(int i = 0;i<M;i++){
    adj[A[i]].emplace_back(B[i],T[i]);
    adj[B[i]].emplace_back(A[i],T[i]);
  }
  multiset<i64> ms;
  vector<i64> com;
  int cc = 0;
  for(int i = 0;i<N;i++){
    if(!vis[i] && adj[i].size() <= 1){
      mini = 1e9;
      dfs(i);
      dfs2(i,-1);
      ms.insert(mini);
      com.push_back(mini);
      cc ++;
    }
  }
  assert(cc - 1 == N - M - 1);
  assert(cc != 1);
  if(cc == 1){
    i64 ans = 0;
    for(int i = 0;i<N;i++){
      ans = max(ans,max(up[i],down[i]));
    }
    return ans;
  }
  if(cc == 2){
    i64 sum = 0;
    while(ms.size() > 0){
      sum += *ms.begin();
      ms.erase(ms.begin());
    }
    return sum + (cc - 1) * L;
  }
  i64 ans = 1e9;
  for(i64 c : com){
    ms.erase(ms.find(c));
    i64 maxi1 = *(--ms.end());
    ms.erase(ms.find(maxi1));
    i64 maxi2 = *(--ms.end());
    ans = min(ans,max(maxi1 + maxi2 + 2 * L,maxi1 + c + L));
    ms.insert(c);
    ms.insert(maxi1);
  }
  return ans;
}

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 37 ms 17488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 4440 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 37 ms 17488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 41 ms 9684 KB Output is correct
2 Correct 42 ms 9944 KB Output is correct
3 Correct 41 ms 9784 KB Output is correct
4 Correct 53 ms 9680 KB Output is correct
5 Correct 42 ms 9680 KB Output is correct
6 Correct 42 ms 10456 KB Output is correct
7 Correct 42 ms 9940 KB Output is correct
8 Correct 43 ms 9684 KB Output is correct
9 Correct 40 ms 9684 KB Output is correct
10 Correct 40 ms 9940 KB Output is correct
11 Correct 1 ms 4440 KB Output is correct
12 Correct 39 ms 9680 KB Output is correct
13 Correct 44 ms 9680 KB Output is correct
14 Correct 38 ms 9680 KB Output is correct
15 Correct 41 ms 9680 KB Output is correct
16 Correct 40 ms 9680 KB Output is correct
17 Correct 46 ms 9884 KB Output is correct
18 Correct 39 ms 9680 KB Output is correct
19 Correct 41 ms 9660 KB Output is correct
20 Runtime error 4 ms 9052 KB Execution killed with signal 6
21 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 4440 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 37 ms 17488 KB Output isn't correct
2 Halted 0 ms 0 KB -