oj.uz

답안 #675209

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
675209 2022-12-27T02:58:40 Z vjudge1 Uzastopni (COCI15_uzastopni) C++17
160 / 160
 61 ms 18304 KB 
//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
using namespace std;
const int N = 1e4, M = 1e2;
int a[N + 1], n;
vector<int> adj[N + 1];
bitset<M + 1> dp[N + 1][M + 1];
void read()
{
    cin >> n;
    for (int i = 1; i <= n; ++ i)
    {
        cin >> a[i];
    }
    for (int i = 1; i < n; ++ i)
    {
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
    }
}
void DFS(int u)
{
    dp[u][a[u]][a[u]] = true;
    for (int v : adj[u])
    {
        if (a[v] > a[u])
        {
            DFS(v);
            for (int i = 1; i <= M; ++ i)
            {
                vector<int> avail;
                for (int j = i; j < M; ++ j)
                {
                    if (dp[u][i][j])
                    {
                        avail.push_back(j + 1);
                    }
                }
                for (int j : avail)
                {
                    dp[u][i] |= dp[v][j];
                }
            }
        }
    }
    reverse(adj[u].begin(), adj[u].end());
    for (int v : adj[u])
    {
        if (a[v] < a[u])
        {
            DFS(v);
            for (int i = 1; i <= M; ++ i)
            {
                vector<int> avail;
                for (int j = i; j < M; ++ j)
                {
                    if (dp[v][i][j])
                    {
                        avail.push_back(j + 1);
                    }
                }
                for (int j : avail)
                {
                    dp[u][i] |= dp[u][j];
                }
            }
        }
    }
}
void solve()
{
    for (int u = 1; u <= n; ++ u)
    {
        sort(adj[u].begin(), adj[u].end(), [&](const int &x, const int &y)
        {
            return a[x] < a[y];
        });
    }
    DFS(1);
    int res = 0;
    for (int i = 1; i <= M; ++ i)
    {
        res += dp[1][i].count();
    }
    cout << res;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        //freopen(TASK".OUT", "w", stdout);
    }
    int t = 1;
    bool typetest = false;
    if (typetest)
    {
        cin >> t;
    }
    for (int __ = 1; __ <= t; ++ __)
    {
        //cout << "Case " << __ << ": ";
        read();
        solve();
    }
}

Compilation message

uzastopni.cpp: In function 'int main()':
uzastopni.cpp:96:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
160.0 / 160.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 43 ms 15172 KB Output is correct
12 Correct 17 ms 7924 KB Output is correct
13 Correct 22 ms 9692 KB Output is correct
14 Correct 59 ms 18252 KB Output is correct
15 Correct 59 ms 18296 KB Output is correct
16 Correct 61 ms 18304 KB Output is correct
17 Correct 9 ms 4052 KB Output is correct
18 Correct 28 ms 10884 KB Output is correct
19 Correct 3 ms 724 KB Output is correct
20 Correct 3 ms 724 KB Output is correct