/*

* Sample usage: java StopWatch 1000

* Sample usage: java StopWatch 2000

* Sample usage: java StopWatch 4000

* Sample usage: java StopWatch 8000

*/

public class StopWatch {

private final long start;

public StopWatch(){

start = System.currentTimeMillis();

}

public double elapsedTime(){

long now = System.currentTimeMillis();

return (now-start)/1000.0;

}

public static void main(String[] args){

int N = Integer.parseInt(args[0]);

int[] a = new int[N];

for (int i = 0; i < N; i++)

a[i] = StdRandom.uniform(-1000000, 1000000);

StopWatch timer = new StopWatch();

int cnt = ThreeSum.count(a);

double time = timer.elapsedTime();

StdOut.println(cnt + " triples " + time + " seconds");

}

}