2303. Calculate the total tax payable

class Solution {
public:
    double calculateTax(vector<vector<int>>& brackets, int income) {
      double ans = 0;
      
      for(int i = brackets.size() - 1; i > 0; --i){
        auto &vec = brackets[i];
        auto &vec1 = brackets[i - 1];
        
        //  When income Skip directly when not in this interval 
        if(vec[0] > income && vec1[0] > income){
          continue;
        }
        
        //  The difference in the middle 
        int diff = income - vec1[0];
        
        //  The tax that should be paid for this part of the difference , Here is the actual value 100 times 
        ans += (diff * vec[1]);

        //  The remaining uncomputed income  
        income = vec1[0];
      }
      
      //  Calculate the minimum range , Tax payable , Here is the actual value 100 times 
      ans += (income * brackets[0][1]);
      
      //  Calculate the actual tax 
      ans /= 100;
      
      return ans;
    }
};