public class RandomWalkers {
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public static void main(String[] args) {
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int limite = Integer.parseInt(args[0]);
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int cicli = Integer.parseInt(args[1]);
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int totalePassi = 0;
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for (int i = 0; i < cicli; i++) {
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int x = 0;
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int y = 0;
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int passi = 0;
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while (Math.abs(x) + Math.abs(y) < limite) {
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double r = Math.random();
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if (r < 0.25) {
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x++;
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} else if (r < 0.5) {
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x--;
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} else if (r < 0.75) {
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y++;
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} else {
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y--;
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}
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passi++;
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}
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totalePassi += passi;
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}
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System.out.println("average number of steps = " + ((double) totalePassi / cicli));
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}
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}
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