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Submission #745942

# Submission time Handle Problem Language Result Execution time Memory
745942 2023-05-21T09:50:51 Z bgnbvnbv Cijanobakterije (COCI21_cijanobakterije) C++14
70 / 70
 100 ms 21096 KB 
#include<bits/stdc++.h>
#define TASKNAME "codeforce"
#define pb push_back
#define pli pair<int,int>
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxN=2e5;
const ll inf=1e18;
const ll mod=1e9+7;
ll h[maxN];
ll lab[maxN];
vector<ll>vec[maxN],g[maxN];
ll findset(ll x)
{
    return lab[x]<0?x:lab[x]=findset(lab[x]);
}
void unite(ll u,ll v)
{
    u=findset(u);
    v=findset(v);
    if(u==v) return;
    if(lab[u]>lab[v]) swap(u,v);
    lab[u]+=lab[v];
    lab[v]=u;
    for(auto zz:vec[v]) vec[u].pb(zz);
    vec[v].clear();
}
void dfs(ll u,ll p)
{
    for(int v:g[u])
    {
        if(v!=p)
        {
            h[v]=h[u]+1;
            dfs(v,u);
        }
    }
}
ll ans=0;
ll m;
ll n;
void solve()
{
    cin >> n >> m;
    for(int i=1;i<=n;i++) lab[i]=-1,vec[i].pb(i);
    for(int i=1;i<=m;i++)
    {
        ll u,v;
        cin >> u >> v;
        g[u].pb(v);
        g[v].pb(u);
        unite(u,v);
    }
    for(int i=1;i<=n;i++)
    {
        if(findset(i)==i)
        {
            dfs(i,0);
            ll mx=-1,id=-1;
            h[i]=0;
            for(auto zz:vec[i])
            {
                if(h[zz]>mx)
                {
                    mx=h[zz];
                    id=zz;
                }
            }
            h[id]=0;
            dfs(id,0);
            mx=-1;
            for(auto zz:vec[i])
            {
                mx=max(mx,h[zz]);
            }
            ans+=mx+1;
        }
    }
    cout << ans;
}
int main()
{
    fastio
    //freopen(TASKNAME".INP","r",stdin);
    //freopen(TASKNAME".OUT","w",stdout);
    solve();
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 11220 KB Output is correct
2 Correct 22 ms 12776 KB Output is correct
3 Correct 39 ms 14320 KB Output is correct
4 Correct 45 ms 15816 KB Output is correct
5 Correct 59 ms 17304 KB Output is correct
6 Correct 100 ms 18940 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 21096 KB Output is correct
2 Correct 11 ms 10960 KB Output is correct
3 Correct 19 ms 12116 KB Output is correct
4 Correct 24 ms 13400 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9732 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 6 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 10 ms 11092 KB Output is correct
6 Correct 20 ms 12628 KB Output is correct
7 Correct 22 ms 14016 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9812 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 8 ms 9796 KB Output is correct
6 Correct 7 ms 9688 KB Output is correct
7 Correct 7 ms 9684 KB Output is correct
8 Correct 6 ms 9808 KB Output is correct
9 Correct 6 ms 9804 KB Output is correct
10 Correct 7 ms 9812 KB Output is correct
11 Correct 6 ms 9812 KB Output is correct

Subtask #5
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 11220 KB Output is correct
2 Correct 22 ms 12776 KB Output is correct
3 Correct 39 ms 14320 KB Output is correct
4 Correct 45 ms 15816 KB Output is correct
5 Correct 59 ms 17304 KB Output is correct
6 Correct 100 ms 18940 KB Output is correct
7 Correct 56 ms 21096 KB Output is correct
8 Correct 11 ms 10960 KB Output is correct
9 Correct 19 ms 12116 KB Output is correct
10 Correct 24 ms 13400 KB Output is correct
11 Correct 5 ms 9732 KB Output is correct
12 Correct 5 ms 9684 KB Output is correct
13 Correct 6 ms 9684 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct
15 Correct 10 ms 11092 KB Output is correct
16 Correct 20 ms 12628 KB Output is correct
17 Correct 22 ms 14016 KB Output is correct
18 Correct 5 ms 9812 KB Output is correct
19 Correct 5 ms 9684 KB Output is correct
20 Correct 5 ms 9684 KB Output is correct
21 Correct 5 ms 9684 KB Output is correct
22 Correct 8 ms 9796 KB Output is correct
23 Correct 7 ms 9688 KB Output is correct
24 Correct 7 ms 9684 KB Output is correct
25 Correct 6 ms 9808 KB Output is correct
26 Correct 6 ms 9804 KB Output is correct
27 Correct 7 ms 9812 KB Output is correct
28 Correct 6 ms 9812 KB Output is correct
29 Correct 85 ms 18944 KB Output is correct
30 Correct 34 ms 15268 KB Output is correct
31 Correct 81 ms 17972 KB Output is correct
32 Correct 34 ms 16096 KB Output is correct
33 Correct 69 ms 19012 KB Output is correct
34 Correct 74 ms 17048 KB Output is correct
35 Correct 71 ms 17912 KB Output is correct
36 Correct 62 ms 18156 KB Output is correct
37 Correct 62 ms 19056 KB Output is correct
38 Correct 75 ms 18988 KB Output is correct
39 Correct 85 ms 18600 KB Output is correct