https://codility.com/demo/take-sample-test/max_counters/

Codility-2-4

function solution(N, A) {
    
    var counters = new Uint32Array(N),
        max = 0,
        gMax = 0;
    
    for (i = 0; i < A.length; i++) {
    
        var value = A[i];
    
        if (value > N) {
        
            max = gMax;
        }
        else {
            
            var counter = counters[value-1];
            
            if (counter < max) counter = max;
            
            counters[value-1] = ++counter;
                        
            if (counter > gMax) {
                
                gMax = counter;
            }
        }
    }
    
    for (i = 0; i < N; i++) {
    
        if (counters[i] < max) counters[i] = max;    
    }
    
    return counters;
}