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Count and Say
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//'main' method must be in a class 'Rextester'. //Compiler version 1.8.0_111 import java.util.*; import java.lang.*; class Rextester { public static String countAndSay(int n){ if(n == 1){ return "1"; } String s = countAndSay(n-1); StringBuilder sb = new StringBuilder(); char say = s.charAt(0); int count = 1; for(int i = 1;i<s.length();i++){ char c = s.charAt(i); if(c==say){ count++; } else{ sb.append(count).append(say); say = c; count = 1; } } sb.append(count).append(say); return sb.toString(); } public static void main(String args[]) { System.out.println("Hello, World!"); System.out.println(countAndSay(5)); } }
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Compilation time: 0.82 sec, absolute running time: 0.16 sec, cpu time: 0.14 sec, memory peak: 18 Mb, absolute service time: 1 sec
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