Submission #1039520

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039520		DucNguyen2007	Mergers (JOI19_mergers)	C++14	0 / 100	25 ms	17864 KiB

mergers

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define pii pair<int,int>
#define pll pair<ll,ll>
#define fi first
#define se second
const int maxN=5e5+5;
const ll inf=2e18;
int n,k,c[maxN+1];
vector<int> adj[maxN+1];
set<int> se;
int main()
{
    //freopen("","r",stdin);
    //freopen("","w",stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>k;
    for(int i=1;i<n;i++)
    {
        int u,v;
        cin>>u>>v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    for(int i=1;i<=n;i++)
    {
        cin>>c[i];
    }
    for(int i=1;i<=n;i++)
    {
        if(adj[i].size()==1)
        {
            se.insert(c[i]);
        }
    }
    cout<<se.size()/2;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 24
• Subtask 3: 0 / 14
• Subtask 4: 0 / 22
• Subtask 5: 0 / 30