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Submission #1082673

# Submission time Handle Problem Language Result Execution time Memory
1082673 2024-09-01T05:50:11 Z boyliguanhan Dreaming (IOI13_dreaming) C++17
18 / 100
 43 ms 20112 KB 
#include "dreaming.h"
#include<bits/stdc++.h>
using namespace std;
vector<pair<int,int>> adj[100100];
bitset<100100> vis,vis2;
int mxd[100100], MX, MN;
vector<int> lens;
void dfs1(int n){
    vis[n]=1;
    for(auto [i,j]:adj[n])if(!vis[i])
        dfs1(i), mxd[n]=max(mxd[n],mxd[i]+j);
}
void dfs2(int n,int fromp){
    vis2[n]=1,MX=max(MX,fromp);
    MN=min(MN,max(fromp,mxd[n]));
    vector<int>pre,suf;
    for(auto[i,j]:adj[n])if(!vis2[i])
        pre.push_back(mxd[i]+j),
        suf.push_back(mxd[i]+j);
    pre.insert(pre.begin(),0);
    suf.push_back(0);
    for(int i=1;i<pre.size();i++)
        pre[i]=max(pre[i],pre[i-1]);
    for(int j=pre.size()-1;j--;)
        suf[j]=max(suf[j],suf[j+1]);
    int CC=0;
    for(auto[i,j]:adj[n])if(!vis2[i]) CC++,
        dfs2(i,max({fromp,pre[CC-1],suf[CC+1]})+j);
}
void solve(int n){
    for(int i=0;i<n;i++)
        if(!vis[i]) MN=1e9,dfs1(i),
            dfs2(i,0),lens.push_back(MN);
}
int travelTime(int N,int M,int L,int A[],int B[],int T[]){
    for(int i=0;i<M;i++)
        adj[A[i]].push_back({B[i],T[i]}),
        adj[B[i]].push_back({A[i],T[i]});
    solve(N);
    sort(lens.rbegin(),lens.rend());
    if(lens.size()==1)
        return MX;
    else if(lens.size()==2)
        return max(MX,lens[0]+lens[1]+L);
    else return max(MX,lens[1]+L+max(lens[0],lens[2]+L));
}

Compilation message

dreaming.cpp: In function 'void dfs2(int, int)':
dreaming.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(int i=1;i<pre.size();i++)
      |                 ~^~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 20112 KB Output is correct
2 Correct 41 ms 19272 KB Output is correct
3 Correct 31 ms 18368 KB Output is correct
4 Correct 7 ms 5212 KB Output is correct
5 Correct 6 ms 3932 KB Output is correct
6 Correct 11 ms 6488 KB Output is correct
7 Incorrect 1 ms 2648 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

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

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 20112 KB Output is correct
2 Correct 41 ms 19272 KB Output is correct
3 Correct 31 ms 18368 KB Output is correct
4 Correct 7 ms 5212 KB Output is correct
5 Correct 6 ms 3932 KB Output is correct
6 Correct 11 ms 6488 KB Output is correct
7 Incorrect 1 ms 2648 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 6108 KB Output is correct
2 Correct 19 ms 6108 KB Output is correct
3 Correct 23 ms 6108 KB Output is correct
4 Correct 19 ms 6108 KB Output is correct
5 Correct 19 ms 6108 KB Output is correct
6 Correct 19 ms 6624 KB Output is correct
7 Correct 18 ms 6360 KB Output is correct
8 Correct 17 ms 6112 KB Output is correct
9 Correct 20 ms 6044 KB Output is correct
10 Correct 23 ms 6356 KB Output is correct
11 Correct 2 ms 2652 KB Output is correct
12 Correct 6 ms 3544 KB Output is correct
13 Correct 7 ms 3544 KB Output is correct
14 Correct 8 ms 3544 KB Output is correct
15 Correct 8 ms 3540 KB Output is correct
16 Correct 11 ms 3540 KB Output is correct
17 Correct 7 ms 3544 KB Output is correct
18 Correct 7 ms 3800 KB Output is correct
19 Correct 6 ms 3544 KB Output is correct
20 Correct 2 ms 2652 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 1 ms 2860 KB Output is correct
23 Correct 7 ms 3544 KB Output is correct

Subtask #5
0 / 12.0

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

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 20112 KB Output is correct
2 Correct 41 ms 19272 KB Output is correct
3 Correct 31 ms 18368 KB Output is correct
4 Correct 7 ms 5212 KB Output is correct
5 Correct 6 ms 3932 KB Output is correct
6 Correct 11 ms 6488 KB Output is correct
7 Incorrect 1 ms 2648 KB Output isn't correct
8 Halted 0 ms 0 KB -