You have a cuboid (m*n*p) each block of the cuboid is having a metallic ball. Now we are passing X-ray from front face and getting a bool matrix1 of m*p the elements are set if there is a black spot.(as we are passing X-ray) and another matrix2 of n*p by passing X-ray from right face. Now you have to print the co-ordinate (i,j,k) where mettallic balls are present. Is it possible to get the accurate result from given data or you need more data. If you need more data then what data you need ?