#include <iostream>
#include <sstream>
#include <string>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <cassert>

using namespace std;

#define FOR(i,k,n) for(int i=(k); i<(int)(n); ++i)
#define REP(i,n) FOR(i,0,n)
#define FORIT(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i)

template<class T> void debug(T begin, T end){ for(T i = begin; i != end; ++i) cerr<<*i<<" "; cerr<<endl; }
inline bool valid(int x, int y, int W, int H){ return (x >= 0 && y >= 0 && x < W && y < H); }

typedef long long ll;
const int INF = 100000000;
const double EPS = 1e-8;
const int MOD = 1000000007;
int dx[8] = {1, 0, -1, 0, 1, -1, -1, 1};
int dy[8] = {0, 1, 0, -1, 1, 1, -1, -1};

int main(){
  int N;
  while(cin>>N && N){
    vector<int> l(N);
    REP(i, N) cin>>l[i];
    int M = 256;
    int as, aa, ac;
    double ent = 1e32;
    REP(S, 16)REP(A, 16)REP(C, 16){
      vector<int> R(N + 1);
      R[0] = S;
      REP(i, N) R[i + 1] = (A * R[i] + C) % M;
      REP(i, N) R[i + 1] = (R[i + 1] + l[i]) % M;
      double cnt[256] = {};
      REP(i, N) cnt[R[i + 1]] += 1.0;
      double e = 0;
      REP(i, 256)if(cnt[i] != 0){
        double c = cnt[i];
        e += -c/N * log(c/N);
        if(!(e + EPS < ent)) goto END;
      }
      ent = e;
      as = S, aa = A, ac = C;
END:;
    }
    printf("%d %d %d\n", as, aa, ac);
  }
  return 0;
}