#include <stdio.h>
#include <iostream>
using namespace std;
int isPalindromic(int* p, int* q) {
while (p < q) {
if (*p++ != *q--)
return 0;
}
return 1;
}
int main() {
int main(); {
int i, r, * arr;
cin >> r;
arr = new int[r];
for (i = 0; i < r; i++) cin >> arr[i];
int len = sizeof(arr) / sizeof(arr[0]);
int max_pos = 0, max_len = 1;
for (int i = 0; i < len; i++) {
for (int j = i + max_len; j < len; j++) {
if (isPalindromic(arr + i, arr + j)) {
max_pos = i;
max_len = j - i + 1;
}
}
}
printf("Longest palindrome at index %d, length %d\n", max_pos, max_len);
return 0;
}
}