#include <iostream>
#include <vector>

using namespace std;

int findLongestPlayground(vector<int>& arr) {
    if (arr.empty()) return 0;
    
    int maxLength = 1, currentLength = 1;
    
    for (size_t i = 1; i < arr.size(); i++) {
        if (arr[i] == arr[i - 1]) {
            currentLength++;
        } else {
            maxLength = max(maxLength, currentLength);
            currentLength = 1;
        }
    }
    
    return max(maxLength, currentLength);
}

int main() {
    vector<int> arr = {1, 1, 2, 2, 2, 3, 3, 3, 3, 2, 2, 2, 2, 2};
    
    cout << "Longest Playground Length: " << findLongestPlayground(arr) << endl;
    
    return 0;
}