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T30.java
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41 lines (35 loc) · 1.03 KB
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import java.util.ArrayList;
import java.util.List;
class Interval{
int start;
int end;
public Interval(int start, int end) {
this.start = start;
this.end = end;
}
}
/**
* 注意是否有交并集
*/
public class T30 {
public List<Interval> insert(List<Interval> intervals, Interval newInterval) {
if (newInterval == null || intervals == null) {
return null;
}
ArrayList<Interval> results = new ArrayList<>();
int insertPos = 0;
for (Interval interval: intervals) {
if (interval.end < newInterval.start) {
results.add(interval);
insertPos++;
} else if (interval.start > newInterval.end) {
results.add(interval);
} else {
newInterval.start = Math.min(interval.start, newInterval.start);
newInterval.end = Math.max(interval.end, newInterval.end);
}
}
results.add(insertPos, newInterval);
return results;
}
}