/*
0
1 0
1 0 1
0 1 0 1 */
class Output2 {
public static void main(String args[]) {
for (int i = 1; i <= 4; i++) {
for (int j = 1; j <= i; j++) {
System.out.print(((i + j) % 2) + " ");
}
System.out.print("\n");
}
}
}
0
1 0
1 0 1
0 1 0 1 */
class Output2 {
public static void main(String args[]) {
for (int i = 1; i <= 4; i++) {
for (int j = 1; j <= i; j++) {
System.out.print(((i + j) % 2) + " ");
}
System.out.print("\n");
}
}
}

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