Submission #765705

#	Time	Username	Problem	Language	Result	Execution time	Memory
765705		boyliguanhan	Lampice (COCI19_lampice)	C++17	17 / 110	5045 ms	524288 KiB

lampice

#include<bits/stdc++.h>
using namespace std;
string S;
int ans = 0;
vector<int> adj[50100];
void dfs(int x, string str, int p) {
    str+=S[x-1];
    for(auto i: adj[x]) {
        if(i!=p)
            dfs(i,str,x);
    }
    if(ans < str.size()) {
        string str2 = str;
        reverse(str2.begin(), str2.end());
        if(str==str2) ans = max(ans, (int)str.size());
    }
}
int main() {
    int n;
    cin >> n >> S;
    for(int i = 1; i < n; i++) {
        int a, b;
        cin >> a >> b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    for(int i = 1; i <= n; i++) {
        dfs(i,"",0);
    }
    cout << ans << '\n';
}

Compilation message (stderr)

lampice.cpp: In function 'void dfs(int, std::string, int)':
lampice.cpp:12:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     if(ans < str.size()) {
      |        ~~~~^~~~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 25
• Subtask 3: 0 / 31
• Subtask 4: 0 / 37