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