Arithmetic-Slices.cpp

class Solution {
public:
    int numberOfArithmeticSlices(vector<int>& nums) {
		// if nums size is less than 3 return false
        if(nums.size() < 3)
            return 0;
        
        int cnt = 0, diff;
        
        for(int i = 0; i<nums.size()-2; ++i)
        {
			// storing diff of first 2 elements
            diff = nums[i+1] - nums[i];
			
			// checking for consecutive elements with same difference.
            for(int j = i+2; j<nums.size(); ++j)
            {
				// if we find the same diff of next 2 elements
				// this means we  find consecutive elements
				// increase the Count
                if(nums[j] - nums[j-1] == diff)
                    ++cnt;
                else
				// break as we need to cnt for consecutive diff elements
                    break;
            }
        }
		// return cnt
        return cnt;
    }
};