#include<fstream>
#include<list>
#include<cmath>
using namespace std;
ifstream fin("lca.in");
ofstream fout("lca.out");
const int NMAX = 100005, LOG2NMAX = 18;

list<int> graph[NMAX];
int nodesCount, T;

inline void read_data(){

    fin >> nodesCount >> T;

    int node, father;
    for(node = 2; node <= nodesCount + 1; ++node){

        fin >> father;
        graph[father].push_back(node);
    }
}

int main(){

    read_data();
}