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easiest soultion in java
static String encryption(String s) { int len=s.length(); int gap=(int)Math.ceil(Math.sqrt(len)); StringBuilder sb=new StringBuilder(); int count=0; for(int i=0;i<gap;i++){ for(int j=i;j<s.length();j=j+gap){ sb.append(String.valueOf(s.charAt(j))); } sb.append(" "); } return sb.toString(); }
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Encryption
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easiest soultion in java