class Main {
/**
* Returns a string representation of the given number of nanoseconds.
*/
public static String nsToString(long ns) {
if (ns < 1000L) {
return Long.toString(ns) + "ns";
} else if (ns < 1000000L) {
return Long.toString(ns/1000L) + "us";
} else if (ns < 1000000000L) {
return Long.toString(ns/1000000L) + "ms";
} else if (ns < 60000000000L) {
return String.format("%.2fs", nsToS(ns));
} else {
long duration = ns;
long nanoseconds = duration % 1000;
duration /= 1000;
long microseconds = duration % 1000;
duration /= 1000;
long milliseconds = duration % 1000;
duration /= 1000;
long seconds = duration % 60;
duration /= 60;
long minutes = duration % 60;
duration /= 60;
long hours = duration % 24;
duration /= 24;
long days = duration;
StringBuilder result = new StringBuilder();
if (days != 0) {
result.append(days);
result.append('d');
}
if (result.length() > 1 || hours != 0) {
result.append(hours);
result.append('h');
}
if (result.length() > 1 || minutes != 0) {
result.append(minutes);
result.append('m');
}
result.append(seconds);
result.append('s');
return result.toString();
}
}
/**
* Converts nanoseconds into (fractional) seconds.
*/
public static double nsToS(long ns) {
return ((double) ns)/1000000000.0;
}
}