kimki1124

public static double bestPracticeMean(String town, String strng) {
       return parseTemp(town, strng).stream()
           .collect(averagingDouble(n -> n));
}

public static double bestPracticeVariance(String town, String strng) {
       double mean = mean(town, strng);
       if (mean == -1.0) return -1.0;
       
       return parseTemp(town, strng).stream()

kimki1124

public static double mean(String town, String strng) {
	String[] dataList = strng.split("\n");
	String targetData = null;
	String targetRainfall = null;
	double sum = 0;
	
	for(String data : dataList){
		if(town.equals(data.split(":")[0])){
			targetData = town;
			targetRainfall = data.split(":")[1];

kimki1124

mean("London", data), 51.19(9999999999996) 
variance("London", data), 57.42(833333333374)

public static String data = 
		     "Rome:Jan 81.2,Feb 63.2,Mar 70.3,Apr 55.7,May 53.0,Jun 36.4,Jul 17.5,Aug 27.5,Sep 60.9,Oct 117.7,Nov 111.0,Dec 97.9" +
		     "\n" +
		     "London:Jan 48.0,Feb 38.9,Mar 39.9,Apr 42.2,May 47.3,Jun 52.1,Jul 59.5,Aug 57.2,Sep 55.4,Oct 62.0,Nov 59.0,Dec 52.9" +
		     "\n" +
		     "Paris:Jan 182.3,Feb 120.6,Mar 158.1,Apr 204.9,May 323.1,Jun 300.5,Jul 236.8,Aug 192.9,Sep 66.3,Oct 63.3,Nov 83.2,Dec 154.7" +
		     "\n" +

kimki1124

public static int bestPractice(String first, String second){
    if (first.length() != second.length())
            return -1;
    return (second + second).indexOf(first);
}

kimki1124

public static int shiftedDiff(String first, String second){
    if(first.equals(second)){
    	return 0;
    }
	    
    for(int i=0;i<first.length();i++){
    	String temp = first.substring(0, first.length()-1);
    	temp = first.charAt(first.length()-1) + temp;
    	first = temp;
    	if(first.equals(second)){

kimki1124

"coffee", "eecoff" => 2
"eecoff", "coffee" => 4
"moose", "Moose" => -1
"isn't", "'tisn" => 2
"Esham", "Esham" => 0
"dog", "god" => -1

kimki1124

public static int bestPractice(int n) {
    return (n != 0 && n%9 == 0) ? 9 : n % 9;
}

kimki1124

public static int digital_root(int n) {
	int sum = 0;
		
	if(String.valueOf(n).length() == 1){
		return n;
	}
		
	while(String.valueOf(n).length() != 1){
		sum += n % 10;
		n = n / 10;

kimki1124

digital_root(16)
=> 1 + 6
=> 7

digital_root(942)
=> 9 + 4 + 2
=> 15 ...
=> 1 + 5
=> 6

kimki1124

public static long bestPractice(long m) {
	long mm = 0, n = 0;
	while (mm < m)
		mm += ++n * n * n;
	return mm == m ? n : -1;
}