public void recur(int level,int param) {
    //terminator
    if(level>MAX_LEVEL) {
        return;
    }
    //current logic
    process(level,param);
    //drill down
    recur(level,level+1);
    //restore current status
}

public void divide_recur(problem,param1.param2) {
    //terminator
    if(problem == null) {
        return;
    }
    //prepare data
    data = prepare_data(problem);
    //conquer subproblems
    subresult1 = divide_recur(subproblem[0],p1,...);
    subresult1 = divide_recur(subproblem[0],p1,...);
    subresult1 = divide_recur(subproblem[0],p1,...);
    //final result
    result = process_result(subresult1,subresult2,subresult3);
    //reserve status
}