import java.util.*;
import java.lang.*;
class Main
{
{
int[] a = new int[] {4, 9, 1, 32, 13};
int minDiff = a[1]-a[0];
for (int i = 2 ; i != a.length ; i++) {
minDiff
= Math.
min(minDiff, a
[i
]-a
[i
-1]);}
}
}
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