oj.uz

Submission #128419

# Submission time Handle Problem Language Result Execution time Memory
128419 2019-07-10T22:17:59 Z Gustav Uzastopni (COCI15_uzastopni) C++14
160 / 160
 36 ms 6136 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<pi> vpi;
typedef vector<vi> vvi;
const int inf = 0x3f3f3f3f;
const ll linf = 123456789012345678;
const ll mod = 1000000007;
#pragma GCC optimize("Ofast")
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " = " << x << endl
#define sz(x) ((int)(x).size())

int n;
vvi adj;
vi k;

vvi adj2;
vi visited;

void dfs2(int node, bool back){
    if(visited[node]==1) return;
    visited[node] = 1;
    if((!back && node < 60000) || (back && (node >= 60000 || node < 40000))){
    for(int x : adj2[node]){
        dfs2(x, back);
    }
    }
    if(!back && node >= 60000) dfs2(node-20000+1, back);
    if(back && node >= 40000 && node < 60000) dfs2(node+20000-1, back);
}

pair<vi, vi> dfs(int node, int par){
    vector<pair<vi, vi>> results;
    for(int x : adj[node]){
        if(x == par) continue;
        results.push_back(dfs(x, node));
    }

    for(int i = 0; i < sz(results); i++){
        for(int x : results[i].first){
            adj2[x+40000].push_back(i);
            adj2[i+20000].push_back(x+40000);
        }
        for(int x : results[i].second){
            adj2[x+60000].push_back(i+20000);
            adj2[i].push_back(x+60000);
        }
    }
    dfs2(60000 + k[node], false);
    dfs2(40000 + k[node], true);
    vi start, end;
    for(int i = 0; i <= k[node]; i++){
        if(visited[40000+i]) start.push_back(i);
    }
    for(int i = k[node]; i < 100; i++){
        if(visited[60000+i]) end.push_back(i);
    }
    for(int i = 0; i < sz(results); i++){
        for(int x : results[i].first){
            adj2[x+40000].clear();
            adj2[i+20000].clear();
            visited[i] = 0;
            visited[x+40000] = 0;
            visited[x+60000-1] = 0;
        }
        for(int x : results[i].second){
            adj2[x+60000].clear();
            adj2[i].clear();
            visited[i+20000] = 0;
            visited[x+60000] = 0;
            visited[x+40000+1] = 0;
        }
    }
    visited[k[node]+60000] = 0;
    visited[k[node]+40000+1] = 0;
    visited[k[node]+40000] = 0;
    visited[k[node]+60000-1] = 0;
    return {start, end};
}

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

    adj2 = vvi(100000);
    visited = vi(100000);

    cin >> n;
    k = vi(n);
    adj = vvi(n);
    for(int i = 0; i < n; i++) {
        cin >> k[i];
        k[i]--;
    }
    for(int i = 0; i < n-1; i++){
        int u, v;
        cin >> u >> v;
        u--, v--;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    pair<vi, vi> p = dfs(0, -1);
    cout << sz(p.first)*sz(p.second) << endl;
}

Subtask #1
160.0 / 160.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3064 KB Output is correct
2 Correct 4 ms 3064 KB Output is correct
3 Correct 4 ms 3064 KB Output is correct
4 Correct 4 ms 3064 KB Output is correct
5 Correct 4 ms 3064 KB Output is correct
6 Correct 4 ms 3064 KB Output is correct
7 Correct 4 ms 3192 KB Output is correct
8 Correct 4 ms 3192 KB Output is correct
9 Correct 4 ms 3064 KB Output is correct
10 Correct 4 ms 3064 KB Output is correct
11 Correct 15 ms 3704 KB Output is correct
12 Correct 15 ms 3704 KB Output is correct
13 Correct 15 ms 3676 KB Output is correct
14 Correct 36 ms 6008 KB Output is correct
15 Correct 36 ms 6136 KB Output is correct
16 Correct 36 ms 6008 KB Output is correct
17 Correct 15 ms 3704 KB Output is correct
18 Correct 15 ms 3704 KB Output is correct
19 Correct 13 ms 3832 KB Output is correct
20 Correct 13 ms 3960 KB Output is correct