Submission #716772

#	Time	Username	Problem	Language	Result	Execution time	Memory
716772		vjudge1	Palindromes (APIO14_palindrome)	C++17	8 / 100	1069 ms	131072 KiB

palindrome

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
const int maxn = 5e5 + 100;
const int mod = (int)1e9+7;
int n;
int main() {
    ios_base::sync_with_stdio(false);
    string s;
    cin >> s;
    n = s.size();
    map<string, int> m;
    for(int i = 0; i < n; i++) {
        string t;
        for(int j = i; j < n; j++) {
            t += s[j];
            m[t]++;
        }
    }
    int ans = 0;
    for(auto [t, x] : m) {
        int bad = 0;
        for(int i = 0; i < t.size(); i++) {
            if(t[i] != t[t.size() - i - 1]) bad = 1;
        }
        if(not bad) ans = max(ans, (int)t.size() * x);
    }
    cout << ans << "\n";
}

Compilation message (stderr)

palindrome.cpp: In function 'int main()':
palindrome.cpp:24:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         for(int i = 0; i < t.size(); i++) {
      |                        ~~^~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 15
• Subtask 3: 0 / 24
• Subtask 4: 0 / 26
• Subtask 5: 0 / 27