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Submission #883949

# Submission time Handle Problem Language Result Execution time Memory
883949 2023-12-06T13:24:51 Z vjudge1 Cats or Dogs (JOI18_catdog) C++17
0 / 100
 1 ms 3932 KB 
#include "catdog.h"
#include<bits/stdc++.h>
using namespace std;
int n;
vector<int> con[100005];
int dp[100005][3];
int tip[100005];
void dfs(int nod, int par)
{
    if(tip[nod]==0)
    {
        dp[nod][0]=0;
        dp[nod][1]=0;
        dp[nod][2]=0;
    }
    else if(tip[nod]==1)
    {
        dp[nod][0]=1;
        dp[nod][1]=0;
        dp[nod][2]=1;
    }
    else
    {
        dp[nod][0]=1;
        dp[nod][1]=1;
        dp[nod][2]=0;
    }
    for(auto adj:con[nod])
    {
        if(adj!=par)
        {
            dfs(adj,nod);
            dp[nod][0] += min({dp[adj][0],dp[adj][1]+1,dp[adj][2]+1});
            dp[nod][1] += min({dp[adj][0],dp[adj][1],dp[adj][2]+1});
            dp[nod][2] += min({dp[adj][0],dp[adj][1]+1,dp[adj][2]});
        }
    }
}
void initialize(int N, std::vector<int> A, std::vector<int> B)
{
    n=N;
    for(int i=0;i<n-1;i++)
    {
        con[A[i]].push_back(B[i]);
        con[B[i]].push_back(A[i]);
    }
}
int cat(int v)
{
    tip[v]=1;
    dfs(1,0);
    return min({dp[1][0],dp[1][1],dp[1][2]});
}
int dog(int v)
{
    tip[v]=2;
    dfs(1,0);
    return min({dp[1][0],dp[1][1],dp[1][2]});
}
int neighbor(int v)
{
    tip[v]=0;
    dfs(1,0);
    return min({dp[1][0],dp[1][1],dp[1][2]});
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3932 KB Output is correct
2 Incorrect 1 ms 3932 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3932 KB Output is correct
2 Incorrect 1 ms 3932 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 62.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3932 KB Output is correct
2 Incorrect 1 ms 3932 KB Output isn't correct
3 Halted 0 ms 0 KB -