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| class Solution {
public:
vector<string> summaryRanges(vector<int>& nums) {
vector<string> ans;
if (nums.size()) {
int start = nums[0];
for (int i = 1; i < nums.size(); ++i) {
if (nums[i] != nums[i - 1] + 1) {
if (start == nums[i - 1])
ans.push_back(to_string(start));
else
ans.push_back(to_string(start) + "->" + to_string(nums[i - 1]));
start = nums[i];
}
}
if (start == nums.back())
ans.push_back(to_string(nums.back()));
else
ans.push_back(to_string(start) + "->" + to_string(nums.back()));
}
return ans;
}
};
|