The string “PAYPALISHIRING” is written in a zigzag pattern on a given number of rows like this:
(you may want to display this pattern in a fixed font for better legibility)
P A H N
A P L S I I G
Y I R
And then read line by line: “PAHNAPLSIIGYIR”
Write the code that will take a string and make this conversion given a number of rows:
string convert(string text, int nRows);
convert(“PAYPALISHIRING”, 3) should return “PAHNAPLSIIGYIR”.
func convert(s string, numRows int) string {
if(numRows<=1){
return s
}
var tmp=make([]string,numRows)
cur:=0
direct:=1
for i:=0;i<len(s);i++{
tmp[cur]+=string(s[i])
if cur==0{
direct=1
}else if cur==numRows-1{
direct=-1
}
cur+=direct
}
var ret string
for i:=0;i<numRows;i++{
ret+=tmp[i]
}
return ret
}