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SummaryRanges.java
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30 lines (23 loc) · 839 Bytes
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// Given a sorted integer array without duplicates, return the summary of its ranges.
// For example, given [0,1,2,4,5,7], return ["0->2","4->5","7"].
public class SummaryRanges {
public List<String> summaryRanges(int[] nums) {
List<String> result = new ArrayList();
if(nums.length == 1) {
result.add(nums[0] + "");
return result;
}
for(int i = 0; i < nums.length; i++) {
int current = nums[i];
while(i + 1 < nums.length && (nums[i + 1] - nums[i] == 1)) {
i++;
}
if(current != nums[i]) {
result.add(current + "->" + nums[i]);
} else {
result.add(current + "");
}
}
return result;
}
}