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class Solution {

public double myPow(double x, int n) {

if (n < 0){

// if n is negative

return 1.0 / pow(x, n);

}

// if n is postive

else{

return pow(x, n);

}

}

public double pow(double x, int n){

if (n == 0){

return 1.0;

}

double y = pow(x, n / 2);

if (n % 2 == 0) {

return y * y;

} else {

return y * y * x;

}

}

}