oj.uz

Submission #757687

# Submission time Handle Problem Language Result Execution time Memory
757687 2023-06-13T14:48:37 Z bachhoangxuan Cat Exercise (JOI23_ho_t4) C++17
100 / 100
 395 ms 118448 KB 
// Judges with GCC >= 12 only needs Ofast
// #pragma GCC optimize("O3,no-stack-protector,fast-math,unroll-loops,tree-vectorize")
// MLE optimization
// #pragma GCC optimize("conserve-stack")
// Old judges
// #pragma GCC target("sse4.2,popcnt,lzcnt,abm,mmx,fma,bmi,bmi2")
// New judges. Test with assert(__builtin_cpu_supports("avx2"));
// #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma,tune=native")
// Atcoder
// #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma")
/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
- insert(x)
- find_by_order(k): return iterator to the k-th smallest element
- order_of_key(x): the number of elements that are strictly smaller
*/
#include<bits/stdc++.h>
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
uniform_real_distribution<> pp(0.0,1.0);
#define int long long
#define ld long double
#define pii pair<int,int>
#define piii pair<int,pii>
#define fi first
#define se second
const int inf=1e18;
const int mod=998244353;
const int maxn=200005;
const int bl=650;
const int maxs=650;
const int maxm=200005;
const int maxq=500005;
const int maxl=20;
const int maxa=1000000;
const int root=3;
int power(int a,int n){
    int res=1;
    while(n){
        if(n&1) res=res*a%mod;
        a=a*a%mod;n>>=1;
    }
    return res;
}
const int iroot=power(3,mod-2);
const int base=101;
namespace Tree{
    vector<vector<int>> edge,Min;
    vector<int> lg2,dep,L,R;
    int pos;
    int cmp(int u,int v){
        return (dep[u]<dep[v]?u:v);
    }
    int lca(int u,int v){
        u=L[u];v=L[v];
        if(u>v) swap(u,v);
        int p=lg2[v-u+1];
        return cmp(Min[u][p],Min[v-(1<<p)+1][p]);
    }
    int dist(int u,int v){
        return dep[u]+dep[v]-2*dep[lca(u,v)];
    }
    void dfs(int u,int p){
        L[u]=++pos;Min[pos][0]=u;
        dep[u]=dep[p]+1;
        for(int v:edge[u]){
            if(v==p) continue;
            dfs(v,u);Min[++pos][0]=u;
        }
        R[u]=pos;
    }
    void init(int n){
        lg2.assign(2*n+1,0);
        dep.assign(n+1,0);
        L.assign(n+1,0);
        R.assign(n+1,0);
        edge.resize(n+1);
        Min.assign(2*n+1,vector<int>(maxl,0));
    }
    void build(int n){
        init(n);
        for(int i=1;i<n;i++){
            int u,v;cin >> u >> v;
            edge[u].push_back(v);
            edge[v].push_back(u);
        }
        dfs(1,0);
        for(int i=2;i<=pos;i++) lg2[i]=lg2[i/2]+1;
        for(int i=1;i<20;i++){
            for(int j=1;j<=(pos-(1<<i)+1);j++) Min[j][i]=cmp(Min[j][i-1],Min[j+(1<<(i-1))][i-1]);
        }
    }
}
void solve(){
    int n;cin >> n;
    vector<pii> p(n);
    vector<int> dp(n+1,0),par(n+1),Max(n+1,0);
    for(int i=1;i<=n;i++) par[i]=i;
    for(int i=0;i<n;i++){cin >> p[i].fi;p[i].se=i+1;}
    sort(p.begin(),p.end());Tree::build(n);
    function<int(int)> findpar = [&](int u){
        if(par[u]!=u) return par[u]=findpar(par[u]);
        return u;
    };
    for(auto &[x,u]:p){
        Max[u]=x;
        for(int v:Tree::edge[u]){
            if(Max[v]==0) continue;
            v=findpar(v);par[v]=u;
            dp[u]=max(dp[u],dp[v]+Tree::dist(u,v));
        }
    }
    cout << dp[p.back().se] << '\n';
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    int test=1;//cin >> test;
    while(test--) solve();
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 324 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 324 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 452 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 452 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 324 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 452 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 452 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 4 ms 3136 KB Output is correct
19 Correct 4 ms 3156 KB Output is correct
20 Correct 4 ms 3156 KB Output is correct
21 Correct 5 ms 3156 KB Output is correct
22 Correct 5 ms 3156 KB Output is correct
23 Correct 5 ms 3156 KB Output is correct
24 Correct 5 ms 3156 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 324 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 452 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 452 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 4 ms 3136 KB Output is correct
19 Correct 4 ms 3156 KB Output is correct
20 Correct 4 ms 3156 KB Output is correct
21 Correct 5 ms 3156 KB Output is correct
22 Correct 5 ms 3156 KB Output is correct
23 Correct 5 ms 3156 KB Output is correct
24 Correct 5 ms 3156 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 5 ms 3156 KB Output is correct
27 Correct 5 ms 3152 KB Output is correct
28 Correct 5 ms 3028 KB Output is correct
29 Correct 5 ms 3156 KB Output is correct
30 Correct 6 ms 3020 KB Output is correct
31 Correct 5 ms 3028 KB Output is correct
32 Correct 6 ms 3044 KB Output is correct
33 Correct 5 ms 3028 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 324 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 452 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 452 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 4 ms 3136 KB Output is correct
19 Correct 4 ms 3156 KB Output is correct
20 Correct 4 ms 3156 KB Output is correct
21 Correct 5 ms 3156 KB Output is correct
22 Correct 5 ms 3156 KB Output is correct
23 Correct 5 ms 3156 KB Output is correct
24 Correct 5 ms 3156 KB Output is correct
25 Correct 248 ms 118324 KB Output is correct
26 Correct 244 ms 118448 KB Output is correct
27 Correct 257 ms 118428 KB Output is correct
28 Correct 296 ms 118356 KB Output is correct
29 Correct 317 ms 118084 KB Output is correct
30 Correct 311 ms 118264 KB Output is correct
31 Correct 292 ms 118360 KB Output is correct

Subtask #6
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 303 ms 110476 KB Output is correct
4 Correct 305 ms 110540 KB Output is correct
5 Correct 332 ms 110408 KB Output is correct

Subtask #7
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 324 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 452 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 452 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 4 ms 3136 KB Output is correct
19 Correct 4 ms 3156 KB Output is correct
20 Correct 4 ms 3156 KB Output is correct
21 Correct 5 ms 3156 KB Output is correct
22 Correct 5 ms 3156 KB Output is correct
23 Correct 5 ms 3156 KB Output is correct
24 Correct 5 ms 3156 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 5 ms 3156 KB Output is correct
27 Correct 5 ms 3152 KB Output is correct
28 Correct 5 ms 3028 KB Output is correct
29 Correct 5 ms 3156 KB Output is correct
30 Correct 6 ms 3020 KB Output is correct
31 Correct 5 ms 3028 KB Output is correct
32 Correct 6 ms 3044 KB Output is correct
33 Correct 5 ms 3028 KB Output is correct
34 Correct 248 ms 118324 KB Output is correct
35 Correct 244 ms 118448 KB Output is correct
36 Correct 257 ms 118428 KB Output is correct
37 Correct 296 ms 118356 KB Output is correct
38 Correct 317 ms 118084 KB Output is correct
39 Correct 311 ms 118264 KB Output is correct
40 Correct 292 ms 118360 KB Output is correct
41 Correct 0 ms 212 KB Output is correct
42 Correct 1 ms 320 KB Output is correct
43 Correct 303 ms 110476 KB Output is correct
44 Correct 305 ms 110540 KB Output is correct
45 Correct 332 ms 110408 KB Output is correct
46 Correct 349 ms 114692 KB Output is correct
47 Correct 353 ms 113864 KB Output is correct
48 Correct 354 ms 115020 KB Output is correct
49 Correct 366 ms 113864 KB Output is correct
50 Correct 395 ms 109992 KB Output is correct
51 Correct 377 ms 110164 KB Output is correct
52 Correct 387 ms 110180 KB Output is correct
53 Correct 384 ms 110176 KB Output is correct