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public static void bucketSort(int[] a, int max) { int[] buckets;
if (a == null || max < 1){ return; }
buckets = new int[max];
for (int i = 0; i < a.length; i++){ buckets[a[i]]++; }
for (int i = 0, j = 0; i < max; i++) { while ((buckets[i]--) > 0) { a[j++] = i; } } buckets = null; }
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