?? differences.java
字號(hào):
import java.util.*;
public class Differences {
public static void main(String[] args) {
int vals[] = { 789, 678, 567, 456, 345, 234, 123, 012 };
Set<Integer> diffs = new HashSet<Integer>();
for (int i = 0; i < vals.length; i++)
for (int j = i; j < vals.length; j++)
diffs.add(vals[i] - vals[j]);
System.out.println(diffs.size());
}
}
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