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62 lines (35 loc) · 647 Bytes
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Power.java
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62 lines (35 loc) · 647 Bytes
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class Solution {
public double myPow(double x, int n) {
int flag = 0;
if(n==0)
{
return 1;
}
else if(n<0){
n=-n;
flag=1;
}
double result = PowCorn(x,n);
if(flag==1)
{
result = 1/result;
}
return result;
}
public double PowCorn(double x,int n)
{
if(n==0)
{
return 1;
}
double a = PowCorn(x,n/2);
if(n%2==0)
{
return a*a;
}
else
{
return a*a*x;
}
}
}