Submission #134980

#	Time	Username	Problem	Language	Result	Execution time	Memory
134980		qrno	Palindromes (APIO14_palindrome)	C++14	0 / 100	1091 ms	101476 KiB

palindrome

#include <iostream>
#include <string>
#include <map>
using namespace std;

map <string, int> M;

string a;

inline bool isPalindrome(int l, int r) {
    for (int i = l; i <= r; i++) {
        if (a[i] != a[r-i])
            return false;
    }
    return true;
}

int main() {

    cin >> a;
    int ans = 0;

    for (int i = 0; i < a.size(); i++) {
        for (int j = i; j < a.size(); j++) {
            if (isPalindrome(i, j)) {
                string s;
                for (int k = i; k <= j; k++)
                    s+=a[i];
                M[s]++;

                ans = max(ans, (j-i+1)*M[s]);
            }
        }
    }

    cout << ans << endl;

    return 0;
}

Compilation message (stderr)

palindrome.cpp: In function 'int main()':
palindrome.cpp:23:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < a.size(); i++) {
                     ~~^~~~~~~~~~
palindrome.cpp:24:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j = i; j < a.size(); j++) {
                         ~~^~~~~~~~~~

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