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Copy pathReturnKeypadCode.java
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Copy pathReturnKeypadCode.java
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119 lines (105 loc) · 2.24 KB
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public class solution {
public static String[] keypad(int n){
if(n==0)
{
String ans[] = {""};
return ans;
}
String smallAns[] = keypad(n/10);
char[] alpha = helper(n%10);
String current[];
if(n%10=7 || n%10==9)
{
current = new String[smallAns.length*4];
}
else
{
current = new String[smallAns.length*3];
}
int k = 0;
int i =0;
while(i<current.length)
{
for(int j = 0;j<alpha.length;j++)
{
current[i]= smallAns[k] + alpha[j];
i++;
}
k++;
if(k==smallAns.length)
{
k=0;
}
}
return current;
}
public static char[] helper(int n)
{
if(n==2)
{
char ans[]=new char[3];
ans[0]='a';
ans[1]='b';
ans[2]='c';
return ans;
}
if(n==3)
{
char ans[]=new char[3];
ans[0]='d';
ans[1]='e';
ans[2]='f';
return ans;
}
if(n==4)
{
char ans[]=new char[3];
ans[0]='g';
ans[1]='h';
ans[2]='i';
return ans;
}
if(n==5)
{
char ans[]=new char[3];
ans[0]='j';
ans[1]='k';
ans[2]='l';
return ans;
}
if(n==6)
{
char ans[]=new char[3];
ans[0]='m';
ans[1]='n';
ans[2]='o';
return ans;
}
if(n==7)
{
char ans[]=new char[4];
ans[0]='p';
ans[1]='q';
ans[2]='r';
ans[3]='s';
return ans;
}
if(n==8)
{
char ans[]=new char[3];
ans[0]='t';
ans[1]='u';
ans[2]='v';
return ans;
}
else
{
char ans[]=new char[4];
ans[0]='w';
ans[1]='x';
ans[2]='y';
ans[3]='z';
return ans;
}
}
}