Массивы СИ и на С++

1) In a two-dimensional array the size

of NxM output the last row

2) In a two-dimensional array the size

of NxM output the first column

3) In a two-dimensional array the size

of NxN to output the main diagonal in the opposite direction(inversion)

4) In a two-dimensional array the size

of NxN to output the side diagonal in the opposite direction(inversion)

5) Search element X in main diagonal( main diagonal ia ascending order)

6) Search element X in side diagonal( side diagonal in ascending order). Use algorithm #1 and #2