Method binPow

src/main/java/com/thealgorithms/maths/BinaryPow.java:15–25

Calculate a^p using binary exponentiation [Binary-Exponentiation](https://cp-algorithms.com/algebra/binary-exp.html) @param a the base for exponentiation @param p the exponent - must be greater than 0 @return a^p

(int a, int p)

     * @return a^p
     */
    public static int binPow(int a, int p) {
        int res = 1;
        while (p > 0) {
            if ((p & 1) == 1) {
                res = res * a;
            }
            a = a * a;
            p >>>= 1;
        }
        return res;
    }
}