Submission #265433

#	Time	Username	Problem	Language	Result	Execution time	Memory
265433		square1001	Palindromes (APIO14_palindrome)	C++14	8 / 100	492 ms	131076 KiB

palindrome

#include <string>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
bool is_palindrome(string str) {
	for(int i = 0; i < str.size(); ++i) {
		if(str[i] != str[str.size() - i - 1]) {
			return false;
		}
	}
	return true;
}
int main() {
	string S;
	cin >> S;
	int N = S.size();
	vector<string> pals;
	for(int i = 0; i < N; ++i) {
		for(int j = i + 1; j <= N; ++j) {
			if(is_palindrome(S.substr(i, j - i))) {
				pals.push_back(S.substr(i, j - i));
			}
		}
	}
	sort(pals.begin(), pals.end());
	int cont = 1; long long ans = 0;
	for(int i = 1; i <= pals.size(); ++i) {
		if(i == pals.size() || pals[i - 1] != pals[i]) {
			ans = max(ans, 1LL * cont * int(pals[i - 1].size()));
			cont = 1;
		}
		else ++cont;
	}
	cout << ans << endl;
	return 0;
}

Compilation message (stderr)

palindrome.cpp: In function 'bool is_palindrome(std::string)':
palindrome.cpp:7:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |  for(int i = 0; i < str.size(); ++i) {
      |                 ~~^~~~~~~~~~~~
palindrome.cpp: In function 'int main()':
palindrome.cpp:28:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |  for(int i = 1; i <= pals.size(); ++i) {
      |                 ~~^~~~~~~~~~~~~~
palindrome.cpp:29:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |   if(i == pals.size() || pals[i - 1] != pals[i]) {
      |      ~~^~~~~~~~~~~~~~

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