class BianLiEr {
public static void main(String[] args) {
int[][] arr = { {1,2,3},{4,5},{7,8,9,10,11},{12,13}};
for (int i = 0 ; i < arr.length ; i++) {
for (int j = 0; j < arr[i].length; j++) {
System.out.print(arr[i][j] + " ");
}
System.out.println();
}
}
}
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