oj.uz

답안 #223423

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
223423 2020-04-15T09:03:47 Z dwsc Lampice (COCI19_lampice) C++14
0 / 110
 2123 ms 524292 KB 
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> ii;
string act;
vector<int> adj[50010];
map<string,int> m;
map<string,int> m1,m2;
void dfs(int u,int pa,string s){
    m[s]++;
    //cout << s << "hi\n";
    //cout << s << "hi\n";
    for (int v: adj[u]){
        if (v == pa) continue;
        dfs(v,u,s+act[v]);
    }
}
void dfs1(int u,int pa,string s){
    m1[s]++;
    //cout << s << "hi\n";
    //cout << s << "hi\n";
    for (int v: adj[u]){
        if (v == pa) continue;
        dfs1(v,u,s+act[v]);
    }
}
void dfs2(int u,int pa,string s){
    m2[s]++;
    //cout << s << "hi\n";
    //cout << s << "hi\n";
    for (int v: adj[u]){
        if (v == pa) continue;
        dfs2(v,u,s+act[v]);
    }
}
int main(){
    int n;
    cin >> n;
    cin >> act;
    //cout << act << "read\n";
    ii edge[n-1];
    for (int i = 0; i < n-1; i++){
        int a,b;
        cin >> a >> b;
        a--;
        b--;
        adj[a].push_back(b);
        adj[b].push_back(a);
        edge[i] = ii(a,b);
    }

    int ans = 0;
    for (int i = 0; i < n; i++){
        m.clear();
        //cout << act[i] << "\n";
        string s = "";
        s += act[i];
        dfs(i,-1,s);
        for (auto it = m.begin(); it != m.end(); ++it){
           //cout<< it->first << " " << it->second << "\n";
            if (it->second >= 2) ans = max(ans,2*(int)((it->first).length())-1);
        }
       // cout << "hi\n";
    }
    for (int i = 0; i < n-1; i++){
        int a = edge[i].first,b = edge[i].second;
        string s1 = "",s2 = "";
        s1 += act[a],s2+= act[b];
        m1.clear();
        m2.clear();
        dfs1(a,b,s1);
        dfs2(b,a,s2);
        for (auto it = m1.begin(); it != m1.end(); ++it){
           //cout<< it->first << " " << it->second << "\n";
            if (m2[it->first]) ans = max(ans,2*(int)((it->first).length()));
        }
    }
    cout << ans;
}

Subtask #1
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 74 ms 1536 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 523 ms 524288 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #3
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 2123 ms 524292 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 74 ms 1536 KB Output isn't correct
2 Halted 0 ms 0 KB -