void change(int[] arr) {
  arr[0] = 99;
  arr = new int[]{7,7,7};
}
int[] x = {1,2,3};
change(x);
System.out.println(x[0]);

int i = 0;
while (i++ < 3) { }
System.out.println(i);

int c = 0;
for (int i = 0; i < 3; i++) {
  for (int j = 0; j <= i; j++) {
    c++;
  }
}
System.out.println(c);

int d = 1;
switch (d) {
  case 0: d += 2;
  default: d += 3;
  case 1: d += 4;
}
System.out.println(d);

static void m(int x) { System.out.print("exact"); }
static void m(int... x) { System.out.print("varargs"); }

m(5);

int[] a = {3, 1, 2};
java.util.Arrays.sort(a);
System.out.println(java.util.Arrays.binarySearch(a, 2));

int n = 3, r = 1;
for (int i = 1; i <= n; i++) r *= i;
System.out.println(r);

int a = 1, b = 2;
int x = (a++ > 1) ? a : b++;
System.out.println(a + "," + b + "," + x);

String s = "a";
for (int i = 0; i < 3; i++) s += i;
System.out.println(s);

int[][] m = { {1,2}, {3,4,5} };
System.out.println(m[1].length);