Summary Ranges

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"].

Runtime: 0ms

class Solution {
public:
    vector<string> summaryRanges(vector<int>& nums) {
        vector<string> result;
        
        if(nums.empty()) return result;
        int left = 0, right = left + 1;
        while(left < nums.size()){
            int gap = 1;
            while(right < nums.size() && nums[right] - nums[left] == gap){
                right++;
                gap++;
            }
            result.push_back(left == right - 1 ? to_string(nums[left]) : 
                             to_string(nums[left]) + "->" + to_string(nums[right - 1]));
            left = right;
            right = left + 1;
        }
        return result;
    }
};