oj.uz

Submission #128412

# Submission time Handle Problem Language Result Execution time Memory
128412 2019-07-10T21:54:40 Z Gustav Uzastopni (COCI15_uzastopni) C++14
80 / 160
 68 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+back) return;
    visited[node] = 1+back;
    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
80.0 / 160.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 3064 KB Output is correct
2 Correct 4 ms 3064 KB Output is correct
3 Incorrect 5 ms 3064 KB Output isn't correct
4 Incorrect 5 ms 3064 KB Output isn't correct
5 Incorrect 5 ms 3064 KB Output isn't correct
6 Correct 5 ms 3192 KB Output is correct
7 Correct 4 ms 3192 KB Output is correct
8 Correct 4 ms 3164 KB Output is correct
9 Correct 5 ms 3064 KB Output is correct
10 Correct 5 ms 3064 KB Output is correct
11 Incorrect 15 ms 3704 KB Output isn't correct
12 Incorrect 15 ms 3704 KB Output isn't correct
13 Correct 16 ms 3704 KB Output is correct
14 Incorrect 68 ms 6136 KB Output isn't correct
15 Incorrect 68 ms 6008 KB Output isn't correct
16 Incorrect 68 ms 6008 KB Output isn't correct
17 Correct 16 ms 3704 KB Output is correct
18 Correct 16 ms 3704 KB Output is correct
19 Incorrect 14 ms 3960 KB Output isn't correct
20 Incorrect 14 ms 3960 KB Output isn't correct