oj.uz

Submission #1092163

# Submission time Handle Problem Language Result Execution time Memory
1092163 2024-09-23T11:31:13 Z vjudge1 Capital City (JOI20_capital_city) C++17
41 / 100
 3000 ms 41552 KB 

#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
//#pragma GCC optimize("Ofast,unroll-loops")
//#pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma,tune=native")
#define all(x) x.begin(),x.end()
#define pb push_back
#define for1(i,x,n) for(int i=x;i<=n;i++)
#define for2(i,x,n) for(int i=x;i>=n;i--)
//#define int ll

typedef long long ll;
typedef pair<int,int> pii;

const ll maxn=2e5+13;
const ll mod=1e9+7;
const ll inf=1e18;

int n,k,c[maxn];
vector<int> adj[maxn],L[maxn];

int sz[maxn],par[maxn];
bool flag[maxn],used[maxn],dd[maxn];

void dfs_sz(int u,int pre)
{
    sz[u]=1;
    for(int v: adj[u])
    {
        if (v==pre||used[v]) continue;
        dfs_sz(v,u);
        sz[u]+=sz[v];
    }
}
int Find_cen(int u,int pre,int ts)
{
    for(int v:adj[u])
    {
        if (v==pre || used[v]) continue;
        if (sz[v]*2>ts) return Find_cen(v,u,ts);
    }
    return u;
}
void dfs_on(int u,int pre)
{
    flag[u]=1;
    par[u]=pre;
    dd[c[u]]=0;
    for(int v:adj[u])
    {
        if (v==pre||used[v]) continue;
        dfs_on(v,u);
    }
}
void dfs_off(int u,int pre)
{
    flag[u]=0;
    dd[c[u]]=0;
    for(int v:adj[u])
    {
        if (v==pre||used[v]) continue;
        dfs_off(v,u);
    }
}
vector<int>Q;
int centroid(int u)
{
    dfs_sz(u,-1);
    u=Find_cen(u,-1,sz[u]);
    used[u]=1;
    dfs_on(u,-1);
    Q.clear();
    for(int v:L[c[u]]) Q.pb(v);
    dd[c[u]]=1;
    int res=0;
    while (!Q.empty())
    {
        int u=Q.back();
        Q.pop_back();
        if (!flag[u])
        {
            res=n;
            break;
        }
        if (par[u]==-1) continue;
        if (!dd[c[par[u]]])
        {
            for(int v:L[c[par[u]]])
            {
                if (!flag[v])
                {
                    res=n;
                    break;
                }
                Q.pb(v);
            }
            if (!Q.empty() && !flag[Q.back()]) break;
            dd[c[par[u]]]=1;
            res++;
        }
    }
    Q.clear();
//    Q.clear();
    dfs_off(u,-1);
//    dfs_off(u,-1);
    for(int v: adj[u]) if (!used[v]) res=min(res,centroid(v));
    return res;
}
void sol()
{
    cin >> n>>k;
    for1(i,1,n-1)
    {
        int u,v; cin >> u>>v;
        adj[u].pb(v);
        adj[v].pb(u);
    }
    for1(i,1,n)
    {
        cin >>c[i];
        L[c[i]].pb(i);
    }
    cout << centroid(1);
}

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
//    freopen("wall.inp","r",stdin);
//    freopen("wall.out","w",stdout);
    int t=1;//cin >> t;
    while (t--)
    {
//        cerr<<"avdsava "<< t<<'\n';
        sol();
    }
}
/*
1
3
3 2 3 1 1 2
4 1
6 1
3 5
5 1
2 4
*/

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 4 ms 9816 KB Output is correct
3 Correct 4 ms 9816 KB Output is correct
4 Correct 5 ms 9820 KB Output is correct
5 Correct 5 ms 9816 KB Output is correct
6 Correct 5 ms 9816 KB Output is correct
7 Correct 5 ms 9864 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 6 ms 9820 KB Output is correct
10 Correct 4 ms 9820 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 4 ms 9816 KB Output is correct
3 Correct 4 ms 9816 KB Output is correct
4 Correct 5 ms 9820 KB Output is correct
5 Correct 5 ms 9816 KB Output is correct
6 Correct 5 ms 9816 KB Output is correct
7 Correct 5 ms 9864 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 6 ms 9820 KB Output is correct
10 Correct 4 ms 9820 KB Output is correct
11 Correct 5 ms 9820 KB Output is correct
12 Correct 5 ms 9820 KB Output is correct
13 Correct 5 ms 9948 KB Output is correct
14 Correct 5 ms 9820 KB Output is correct
15 Correct 5 ms 9820 KB Output is correct
16 Correct 8 ms 9820 KB Output is correct
17 Correct 7 ms 10164 KB Output is correct
18 Correct 6 ms 9956 KB Output is correct
19 Correct 6 ms 10104 KB Output is correct
20 Correct 6 ms 10076 KB Output is correct
21 Correct 6 ms 10108 KB Output is correct
22 Correct 6 ms 10332 KB Output is correct
23 Correct 8 ms 10076 KB Output is correct
24 Correct 8 ms 9820 KB Output is correct
25 Correct 5 ms 9876 KB Output is correct
26 Correct 6 ms 10076 KB Output is correct
27 Correct 6 ms 10144 KB Output is correct
28 Correct 6 ms 10076 KB Output is correct
29 Correct 5 ms 10076 KB Output is correct
30 Correct 6 ms 9864 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 334 ms 40788 KB Output is correct
2 Correct 139 ms 41296 KB Output is correct
3 Correct 348 ms 40528 KB Output is correct
4 Correct 140 ms 41128 KB Output is correct
5 Correct 562 ms 37460 KB Output is correct
6 Correct 149 ms 41300 KB Output is correct
7 Correct 1162 ms 38160 KB Output is correct
8 Correct 1419 ms 41168 KB Output is correct
9 Correct 1453 ms 36304 KB Output is correct
10 Correct 1786 ms 33744 KB Output is correct
11 Correct 1472 ms 36816 KB Output is correct
12 Correct 1284 ms 39412 KB Output is correct
13 Correct 1207 ms 33428 KB Output is correct
14 Correct 1507 ms 39696 KB Output is correct
15 Correct 905 ms 39628 KB Output is correct
16 Correct 1236 ms 34508 KB Output is correct
17 Correct 1226 ms 35012 KB Output is correct
18 Correct 1266 ms 35020 KB Output is correct
19 Correct 883 ms 38344 KB Output is correct
20 Correct 2196 ms 40396 KB Output is correct
21 Correct 4 ms 9820 KB Output is correct

Subtask #4
0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 4 ms 9816 KB Output is correct
3 Correct 4 ms 9816 KB Output is correct
4 Correct 5 ms 9820 KB Output is correct
5 Correct 5 ms 9816 KB Output is correct
6 Correct 5 ms 9816 KB Output is correct
7 Correct 5 ms 9864 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 6 ms 9820 KB Output is correct
10 Correct 4 ms 9820 KB Output is correct
11 Correct 5 ms 9820 KB Output is correct
12 Correct 5 ms 9820 KB Output is correct
13 Correct 5 ms 9948 KB Output is correct
14 Correct 5 ms 9820 KB Output is correct
15 Correct 5 ms 9820 KB Output is correct
16 Correct 8 ms 9820 KB Output is correct
17 Correct 7 ms 10164 KB Output is correct
18 Correct 6 ms 9956 KB Output is correct
19 Correct 6 ms 10104 KB Output is correct
20 Correct 6 ms 10076 KB Output is correct
21 Correct 6 ms 10108 KB Output is correct
22 Correct 6 ms 10332 KB Output is correct
23 Correct 8 ms 10076 KB Output is correct
24 Correct 8 ms 9820 KB Output is correct
25 Correct 5 ms 9876 KB Output is correct
26 Correct 6 ms 10076 KB Output is correct
27 Correct 6 ms 10144 KB Output is correct
28 Correct 6 ms 10076 KB Output is correct
29 Correct 5 ms 10076 KB Output is correct
30 Correct 6 ms 9864 KB Output is correct
31 Correct 334 ms 40788 KB Output is correct
32 Correct 139 ms 41296 KB Output is correct
33 Correct 348 ms 40528 KB Output is correct
34 Correct 140 ms 41128 KB Output is correct
35 Correct 562 ms 37460 KB Output is correct
36 Correct 149 ms 41300 KB Output is correct
37 Correct 1162 ms 38160 KB Output is correct
38 Correct 1419 ms 41168 KB Output is correct
39 Correct 1453 ms 36304 KB Output is correct
40 Correct 1786 ms 33744 KB Output is correct
41 Correct 1472 ms 36816 KB Output is correct
42 Correct 1284 ms 39412 KB Output is correct
43 Correct 1207 ms 33428 KB Output is correct
44 Correct 1507 ms 39696 KB Output is correct
45 Correct 905 ms 39628 KB Output is correct
46 Correct 1236 ms 34508 KB Output is correct
47 Correct 1226 ms 35012 KB Output is correct
48 Correct 1266 ms 35020 KB Output is correct
49 Correct 883 ms 38344 KB Output is correct
50 Correct 2196 ms 40396 KB Output is correct
51 Correct 4 ms 9820 KB Output is correct
52 Correct 216 ms 24836 KB Output is correct
53 Correct 218 ms 25036 KB Output is correct
54 Correct 231 ms 25032 KB Output is correct
55 Correct 260 ms 25004 KB Output is correct
56 Correct 230 ms 24920 KB Output is correct
57 Correct 218 ms 25036 KB Output is correct
58 Correct 267 ms 28112 KB Output is correct
59 Correct 231 ms 28240 KB Output is correct
60 Correct 303 ms 27220 KB Output is correct
61 Correct 269 ms 26964 KB Output is correct
62 Correct 150 ms 41552 KB Output is correct
63 Correct 142 ms 41300 KB Output is correct
64 Correct 862 ms 41324 KB Output is correct
65 Correct 150 ms 41368 KB Output is correct
66 Execution timed out 3082 ms 33372 KB Time limit exceeded
67 Halted 0 ms 0 KB -