Lcs with 3 strings problem

#1

one test case is failing

#2

@Learning_bunny hey for initializing you need to take all cases when i=0 but i,j can be either zero or non zero.

Also for else case when the characters are not equal, you need to take maximum three cases i.e. dp[i-1][j][k], dp[i][j-1][k], dp[i][j][k-1].