As per the question, RMO is used
therefore the matrix will look like
A[1][1] A[1][2] .................................... A[1][100]
A[2][99]
A[3][98]
.
.
.
A[98][3]
A[99][2]
A[100][1] A[100][2] ...............................A[100][100]
We want to go to element A[100][50]
means we need Row=100 and column=50
row1 has all 100 elements
row2 to 98 have 1 element only
row 100 has all 100 elements
therefore RMO = base + cross row1 + cross elements of row 2 to 98 + cross 49 elements in row 100 to reach 50th element
= 1000 + 100 + 98 + 49
= 1247Bytes?