oj.uz

Submission #675197

# Submission time Handle Problem Language Result Execution time Memory
675197 2022-12-27T02:50:11 Z vjudge1 Uzastopni (COCI15_uzastopni) C++17
160 / 160
 99 ms 17864 KB 
#include <iostream>
#include <bitset>
#include <vector>
#include <algorithm>
#include <cstdio>
using namespace std;
bitset <101> dp[10001][101];
int n,a[10001],u,v,res;
vector <int> ke[10001];
void dfs(int u){
    dp[u][a[u]][a[u]]=1;
    if (ke[u].empty())
        return;
    int pos=-1,pos2=1e9;
    for (int i=0;i<ke[u].size();i++){
        int v=ke[u][i];
        dfs(v);
        if (a[v]<=a[u])
            pos=max(pos,i);
        if (a[v]>=a[u])
            pos2=min(pos2,i);
    }
    for (int it=pos2;it<ke[u].size();it++){
        int v=ke[u][it];
        for (int j=a[u];j<=100;j++)
            if (!dp[u][a[u]][j])
                for (int i=a[u]+1;i<=j;i++)
                    dp[u][a[u]][j]=dp[u][a[u]][j]|(dp[u][a[u]][i-1]&dp[v][i][j]);
    }
    for (int it=pos;it>=0;it--){
        int v=ke[u][it];
        for (int j=1;j<=a[u];j++)
            if (!dp[u][j][a[u]])
                for (int i=j;i<a[u];i++)
                    dp[u][j][a[u]]=dp[u][j][a[u]]|(dp[u][i+1][a[u]]&dp[v][j][i]);
    }
    for (int i=1;i<=a[u];i++)
        for (int j=a[u];j<=100;j++)
            dp[u][i][j]=dp[u][i][j]|(dp[u][i][a[u]]&dp[u][a[u]][j]);
}
int main(){
    ios_base::sync_with_stdio(NULL);cin.tie(nullptr);
    cin >> n;
    for (int i=1;i<=n;i++)
        cin >> a[i];
    for (int i=1;i<n;i++){
        cin >> u >> v;
        ke[u].push_back(v);
    }
    for (int i=1;i<=n;i++)
        if (!ke[i].empty())
            sort(ke[i].begin(),ke[i].end(),[](int i, int j){
                    return a[i]<a[j];
                 });
    dfs(1);
    int cnt=0;
    for (int i=1;i<=100;i++)
        for (int j=1;j<=100;j++)
            cnt+=dp[1][i][j];
    cout << cnt;
}

Compilation message

uzastopni.cpp: In function 'void dfs(int)':
uzastopni.cpp:15:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for (int i=0;i<ke[u].size();i++){
      |                  ~^~~~~~~~~~~~~
uzastopni.cpp:23:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for (int it=pos2;it<ke[u].size();it++){
      |                      ~~^~~~~~~~~~~~~

Subtask #1
160.0 / 160.0

# Verdict Execution time Memory 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 2 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 724 KB Output is correct
11 Correct 59 ms 16428 KB Output is correct
12 Correct 56 ms 16516 KB Output is correct
13 Correct 58 ms 16500 KB Output is correct
14 Correct 91 ms 17844 KB Output is correct
15 Correct 99 ms 17864 KB Output is correct
16 Correct 86 ms 17828 KB Output is correct
17 Correct 57 ms 16468 KB Output is correct
18 Correct 57 ms 16460 KB Output is correct
19 Correct 23 ms 16436 KB Output is correct
20 Correct 23 ms 16372 KB Output is correct