class Solution {
    public double Power(double base, int exponent) {
        boolean flag=true;
        if(exponent<0)
        {
            exponent=exponent^0xffffffff;
            flag=false;
            exponent++;
        }
        double res=1;
        while(exponent-->0)
            res*=base;
        if(!flag)
            return 1/res;
        else
            return res;
  }
}