public class Ex09MinGap {

	public static int minGap(int[] list) {
		if (list.length < 2) {
			return 0;
		}
		int minG = Integer.MAX_VALUE;
		for (int i = 0; i < list.length-1; i++) {
			int n1 = list[i];
			int n2 = list[i+1];
			if (n2 - n1 < minG) {
				minG = n2 - n1;
			}
		}
		return minG;
	}
	
	public static void main(String[] args) {
		int[] list1 = { 1, 3, 6, 7, 12 };
		int[] list2 = { 12, 3, 6, 7 };
		int[] list3 = { 1 };
		System.out.println( minGap(list1) );
		System.out.println( minGap(list2) );
		System.out.println( minGap(list3) );
	}

}