import java.util.Arrays;
import java.util.stream.IntStream;
import java.util.stream.Stream;
 
class Main {
  public static void main(String[] args) throws Exception {
    int[][] matrix = getTimeMatrix();
 
    int[][] result = Stream.of(matrix)
        .map(a -> IntStream.of(a).filter(i -> i != 0).count())
        .map(c -> IntStream.range(0, c.intValue()).toArray())
        .toArray(int[][]::new);
 
    System.out.println(Arrays.deepToString(result));
  }
 
  static int[][] getTimeMatrix() {
    return new int[][] { { 10, 20, 0, 1 }, { 1, 0, 0, 50 }, { 1, 1, 1, 1 } };
  }
}

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