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Submission #765705

# Submission time Handle Problem Language Result Execution time Memory
765705 2023-06-25T03:29:58 Z boyliguanhan Lampice (COCI19_lampice) C++17
17 / 110
 5000 ms 524288 KB 
#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

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
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1492 KB Output is correct
2 Correct 14 ms 1512 KB Output is correct
3 Correct 226 ms 1588 KB Output is correct
4 Correct 366 ms 1648 KB Output is correct
5 Correct 1 ms 1364 KB Output is correct
6 Correct 1 ms 1364 KB Output is correct
7 Correct 1 ms 1364 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Runtime error 249 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 31.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5045 ms 173664 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1492 KB Output is correct
2 Correct 14 ms 1512 KB Output is correct
3 Correct 226 ms 1588 KB Output is correct
4 Correct 366 ms 1648 KB Output is correct
5 Correct 1 ms 1364 KB Output is correct
6 Correct 1 ms 1364 KB Output is correct
7 Correct 1 ms 1364 KB Output is correct
8 Runtime error 249 ms 524288 KB Execution killed with signal 9
9 Halted 0 ms 0 KB -