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Submission #1048317

# Submission time Handle Problem Language Result Execution time Memory
1048317 2024-08-08T06:44:12 Z KiaRez Cat Exercise (JOI23_ho_t4) C++17
54 / 100
 226 ms 85328 KB 
/*
    IN THE NAME OF GOD
*/
#include <bits/stdc++.h>

// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef long double ld;

#define F                                      first
#define S                                      second
#define Mp                                     make_pair
#define pb                                     push_back
#define pf                                     push_front
#define size(x)                                ((ll)x.size())
#define all(x)                                 (x).begin(),(x).end()
#define kill(x)		                           cout << x << '\n', exit(0);
#define fuck(x)                                cout << "(" << #x << " , " << x << ")" << endl
#define endl                                   '\n'

const int N = 3e5+23, lg = 18;
ll Mod = 1e9+7; //998244353;

inline ll MOD(ll a, ll mod=Mod) {a%=mod; (a<0)&&(a+=mod); return a;}
inline ll poww(ll a, ll b, ll mod=Mod) {
    ll ans = 1;
    a=MOD(a, mod);
    while (b) {
        if (b & 1) ans = MOD(ans*a, mod);
        b >>= 1;
        a = MOD(a*a, mod);
    }
    return ans;
}

int n, tim, rev[N], par[lg][N], p[N], q[N], tin[N], tout[N];
int h[N], lazy[2*N], mark[N];
pii seg[2*N];
vector<int> adj[N], tree[N];

int getPar(int v, int dist) {
    for(int i=0;i<lg;i++) if((dist>>i)%2==1) v=par[i][v];
    return v;
}

int LCA(int v, int u) {
    if(h[u] < h[v]) swap(v,u);
    u = getPar(u, h[u]-h[v]);
    if(v == u) return v;
    for(int i=lg-1; i>=0; i--) {
        if(par[i][v] != par[i][u]) {
            v=par[i][v], u=par[i][u];
        }
    }
    return par[0][v];
}

void init(int v, int p=0) {
    tin[v] = ++tim, h[v] = h[p] + 1, par[0][v] = p;
    rev[tim] = v;
    for(int i=1; i<lg; i++) par[i][v]=par[i-1][par[i-1][v]];
    for(auto u : adj[v]) {
        if(u == p) continue;
        init(u, v);
    }
    tout[v] = tim+1;
}

void build(int ind=1) {
    if(ind >= (1<<lg)) {
        seg[ind].S = p[rev[ind - (1<<lg) + 1]];
        return;
    }
    build(2*ind); build(2*ind+1);
    seg[ind] = max(seg[2*ind], seg[2*ind+1]);
}

void pushdown(int ind) {
    seg[ind].F += lazy[ind];
    (ind < (1<<lg)) && (lazy[2*ind] += lazy[ind]);
    (ind < (1<<lg)) && (lazy[2*ind+1] += lazy[ind]);
    lazy[ind] = 0;
}

void update(int l, int r, int x, int ind=1, int lc=1, int rc=(1<<lg)+1) {
    pushdown(ind);
    if(l >= rc || lc >= r) return;
    if(lc >= l && rc <= r) {
        lazy[ind] += x; pushdown(ind);
        return;
    }
    int mid = (lc+rc)/2;
    update(l, r, x, 2*ind, lc, mid);
    update(l, r, x, 2*ind+1, mid, rc);
    seg[ind] = max(seg[2*ind], seg[2*ind+1]);
}

pii query(int l, int r, int ind=1, int lc=1, int rc=(1<<lg)+1) {
    pushdown(ind);
    if(l >= rc || lc >= r) return Mp(0, 0);
    if(lc >=l && rc <= r) return seg[ind];
    int mid = (lc+rc)/2;
    return max(query(l,r,2*ind,lc,mid), query(l,r,2*ind+1,mid,rc));
}

void divide(int v) {
    mark[v] = 1;
    int p = 0;
    for(auto u : adj[v]) {
        if(mark[u] == 1) continue;
        if(u == par[0][v]) {
            p = u;
            continue;
        }
        update(1, n+1, -1);
        update(tin[u], tout[u], 1);
        int rt = q[query(tin[u], tout[u]).S];
        divide(rt);
        tree[v].pb(rt);
        // cout<<v<<' '<<rt<<endl;
        update(1, n+1, 1);
        update(tin[u], tout[u], -1);
    }

    if(p == 0) return;
    update(tin[v], tout[v], -1);
    int rt = q[query(1, n+1).S];
        // cout<<v<<' '<<rt<<endl;
    tree[v].pb(rt);
    divide(rt);
}

int dp[N];
void dfs(int v) {
    for(int u : tree[v]) {
        dfs(u);
        int lca = LCA(v, u);
        dp[v] = max(dp[v], dp[u]+h[v]+h[u]-2*h[lca]);
    }
    // fuck(v); fuck(dp[v]);
}

int main () {
	ios_base::sync_with_stdio(false), cin.tie(0);

	cin>>n;
    for(int i=1; i<=n; i++) cin>>p[i], q[p[i]]=i;
    for(int v,u,i=1; i<n; i++) {
        cin>>v>>u; adj[v].pb(u); adj[u].pb(v);
    }

    init(q[n], 0);
    build(1);

    divide(q[n]);

    dfs(q[n]);

    cout<<dp[q[n]]<<endl;

	return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 47708 KB Output is correct
2 Correct 5 ms 47708 KB Output is correct
3 Correct 5 ms 47708 KB Output is correct
4 Correct 5 ms 47708 KB Output is correct
5 Correct 6 ms 47708 KB Output is correct
6 Correct 5 ms 47656 KB Output is correct
7 Correct 6 ms 47708 KB Output is correct
8 Correct 6 ms 47716 KB Output is correct
9 Correct 6 ms 47604 KB Output is correct
10 Correct 5 ms 47708 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 47708 KB Output is correct
2 Correct 5 ms 47708 KB Output is correct
3 Correct 5 ms 47708 KB Output is correct
4 Correct 5 ms 47708 KB Output is correct
5 Correct 6 ms 47708 KB Output is correct
6 Correct 5 ms 47656 KB Output is correct
7 Correct 6 ms 47708 KB Output is correct
8 Correct 6 ms 47716 KB Output is correct
9 Correct 6 ms 47604 KB Output is correct
10 Correct 5 ms 47708 KB Output is correct
11 Correct 6 ms 47596 KB Output is correct
12 Correct 6 ms 47708 KB Output is correct
13 Correct 6 ms 47560 KB Output is correct
14 Correct 6 ms 47684 KB Output is correct
15 Correct 6 ms 47704 KB Output is correct
16 Correct 7 ms 47708 KB Output is correct
17 Correct 6 ms 47692 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 47708 KB Output is correct
2 Correct 5 ms 47708 KB Output is correct
3 Correct 5 ms 47708 KB Output is correct
4 Correct 5 ms 47708 KB Output is correct
5 Correct 6 ms 47708 KB Output is correct
6 Correct 5 ms 47656 KB Output is correct
7 Correct 6 ms 47708 KB Output is correct
8 Correct 6 ms 47716 KB Output is correct
9 Correct 6 ms 47604 KB Output is correct
10 Correct 5 ms 47708 KB Output is correct
11 Correct 6 ms 47596 KB Output is correct
12 Correct 6 ms 47708 KB Output is correct
13 Correct 6 ms 47560 KB Output is correct
14 Correct 6 ms 47684 KB Output is correct
15 Correct 6 ms 47704 KB Output is correct
16 Correct 7 ms 47708 KB Output is correct
17 Correct 6 ms 47692 KB Output is correct
18 Correct 11 ms 48472 KB Output is correct
19 Correct 11 ms 48476 KB Output is correct
20 Correct 10 ms 48476 KB Output is correct
21 Correct 11 ms 48220 KB Output is correct
22 Correct 10 ms 48272 KB Output is correct
23 Correct 10 ms 48088 KB Output is correct
24 Correct 12 ms 48220 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 47708 KB Output is correct
2 Correct 5 ms 47708 KB Output is correct
3 Correct 5 ms 47708 KB Output is correct
4 Correct 5 ms 47708 KB Output is correct
5 Correct 6 ms 47708 KB Output is correct
6 Correct 5 ms 47656 KB Output is correct
7 Correct 6 ms 47708 KB Output is correct
8 Correct 6 ms 47716 KB Output is correct
9 Correct 6 ms 47604 KB Output is correct
10 Correct 5 ms 47708 KB Output is correct
11 Correct 6 ms 47596 KB Output is correct
12 Correct 6 ms 47708 KB Output is correct
13 Correct 6 ms 47560 KB Output is correct
14 Correct 6 ms 47684 KB Output is correct
15 Correct 6 ms 47704 KB Output is correct
16 Correct 7 ms 47708 KB Output is correct
17 Correct 6 ms 47692 KB Output is correct
18 Correct 11 ms 48472 KB Output is correct
19 Correct 11 ms 48476 KB Output is correct
20 Correct 10 ms 48476 KB Output is correct
21 Correct 11 ms 48220 KB Output is correct
22 Correct 10 ms 48272 KB Output is correct
23 Correct 10 ms 48088 KB Output is correct
24 Correct 12 ms 48220 KB Output is correct
25 Correct 6 ms 47672 KB Output is correct
26 Correct 11 ms 48400 KB Output is correct
27 Correct 11 ms 48476 KB Output is correct
28 Correct 11 ms 48500 KB Output is correct
29 Correct 17 ms 48476 KB Output is correct
30 Correct 11 ms 47960 KB Output is correct
31 Correct 11 ms 47964 KB Output is correct
32 Correct 11 ms 47964 KB Output is correct
33 Correct 13 ms 48056 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 47708 KB Output is correct
2 Correct 5 ms 47708 KB Output is correct
3 Correct 5 ms 47708 KB Output is correct
4 Correct 5 ms 47708 KB Output is correct
5 Correct 6 ms 47708 KB Output is correct
6 Correct 5 ms 47656 KB Output is correct
7 Correct 6 ms 47708 KB Output is correct
8 Correct 6 ms 47716 KB Output is correct
9 Correct 6 ms 47604 KB Output is correct
10 Correct 5 ms 47708 KB Output is correct
11 Correct 6 ms 47596 KB Output is correct
12 Correct 6 ms 47708 KB Output is correct
13 Correct 6 ms 47560 KB Output is correct
14 Correct 6 ms 47684 KB Output is correct
15 Correct 6 ms 47704 KB Output is correct
16 Correct 7 ms 47708 KB Output is correct
17 Correct 6 ms 47692 KB Output is correct
18 Correct 11 ms 48472 KB Output is correct
19 Correct 11 ms 48476 KB Output is correct
20 Correct 10 ms 48476 KB Output is correct
21 Correct 11 ms 48220 KB Output is correct
22 Correct 10 ms 48272 KB Output is correct
23 Correct 10 ms 48088 KB Output is correct
24 Correct 12 ms 48220 KB Output is correct
25 Incorrect 226 ms 85328 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #6
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 47708 KB Output is correct
2 Correct 7 ms 47560 KB Output is correct
3 Correct 212 ms 65616 KB Output is correct
4 Correct 215 ms 65728 KB Output is correct
5 Correct 206 ms 65364 KB Output is correct

Subtask #7
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 47708 KB Output is correct
2 Correct 5 ms 47708 KB Output is correct
3 Correct 5 ms 47708 KB Output is correct
4 Correct 5 ms 47708 KB Output is correct
5 Correct 6 ms 47708 KB Output is correct
6 Correct 5 ms 47656 KB Output is correct
7 Correct 6 ms 47708 KB Output is correct
8 Correct 6 ms 47716 KB Output is correct
9 Correct 6 ms 47604 KB Output is correct
10 Correct 5 ms 47708 KB Output is correct
11 Correct 6 ms 47596 KB Output is correct
12 Correct 6 ms 47708 KB Output is correct
13 Correct 6 ms 47560 KB Output is correct
14 Correct 6 ms 47684 KB Output is correct
15 Correct 6 ms 47704 KB Output is correct
16 Correct 7 ms 47708 KB Output is correct
17 Correct 6 ms 47692 KB Output is correct
18 Correct 11 ms 48472 KB Output is correct
19 Correct 11 ms 48476 KB Output is correct
20 Correct 10 ms 48476 KB Output is correct
21 Correct 11 ms 48220 KB Output is correct
22 Correct 10 ms 48272 KB Output is correct
23 Correct 10 ms 48088 KB Output is correct
24 Correct 12 ms 48220 KB Output is correct
25 Correct 6 ms 47672 KB Output is correct
26 Correct 11 ms 48400 KB Output is correct
27 Correct 11 ms 48476 KB Output is correct
28 Correct 11 ms 48500 KB Output is correct
29 Correct 17 ms 48476 KB Output is correct
30 Correct 11 ms 47960 KB Output is correct
31 Correct 11 ms 47964 KB Output is correct
32 Correct 11 ms 47964 KB Output is correct
33 Correct 13 ms 48056 KB Output is correct
34 Incorrect 226 ms 85328 KB Output isn't correct
35 Halted 0 ms 0 KB -