Method lca

InterviewBit_problems/LeastCommonAncestor/solution.cpp:37–44

int Solution::lca(TreeNode* A, int B, int C) {

    if(find(A,B) && find(A,C)) {  //If both the given nodes exists in the tree 
        return solve(A,B,C)->val;
    } else {
        return -1; // Else return -1
    }
}