#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vi = vector<int>;
using vl = vector<ll>;
#define rep3(i, a, b, c) for (ll i = (a); i < (b); i += (c))
#define rep2(i, a, b) rep3(i, a, b, 1)
#define rep1(i, n) rep2(i, 0, n)
#define rep0(n) rep1(aaaaa, n)
#define ov4(a, b, c, d, name, ...) name
#define rep(...) ov4(__VA_ARGS__, rep3, rep2, rep1, rep0)(__VA_ARGS__)
#define per(i, a, b) for (ll i = (a) - 1; i >= (b); i--)
#define fore(e, v) for (auto &&e : v)
#define all(a) begin(a), end(a)
#define sz(a) (int)(size(a))
#define lb(v, x) (lower_bound(all(v), x) - begin(v))
#define eb emplace_back

template <typename T, typename S> bool chmin(T &a, const S &b) {
  return a > b ? a = b, 1 : 0;
}
template <typename T, typename S> bool chmax(T &a, const S &b) {
  return a < b ? a = b, 1 : 0;
}
const int INF = 1e9 + 100;
const ll INFL = 3e18 + 100;
#define i128 __int128_t
struct _ {
  _() { cin.tie(0)->sync_with_stdio(0), cout.tie(0); }
} __;

template <class S, S (*op)(S, S), S (*e)()> struct segtree {
  segtree(int n) : segtree(vector<S>(n, e())) {}
  segtree(const vector<S> &v) : n(sz(v)) {
    s = bit_ceil(unsigned(n));
    log = countr_zero(unsigned(s));
    d = vector<S>(2 * s, e());
    rep(i, n) d[s + i] = v[i];
    per(i, s, 1) update(i);
  } // d655ce82
  void set(int p, S x) {
    d[p += s] = x;
    rep(i, 1, log + 1) update(p >> i);
  } // 255c3505
  S prod(int l, int r) const {
    S sml = e(), smr = e();
    l += s, r += s;
    while (l < r) {
      if (l & 1)
        sml = op(sml, d[l++]);
      if (r & 1)
        smr = op(d[--r], smr);
      l >>= 1, r >>= 1;
    }
    return op(sml, smr);
  } // 6f0dc967
  S all_prod() const { return d[1]; }
  S get(int p) const { return d[s + p]; }

private:
  int n, s, log;
  vector<S> d;
  void update(int k) { d[k] = op(d[k * 2], d[k * 2 + 1]); }
};


pii seg_e(){
  return pii{INF,-1};
}

pii seg_op(pii a,pii b){
  return min(a,b);
}


int main() {
  int N;
  cin>>N;
  segtree<pii, seg_op, seg_e> seg(N);
  rep(i,N){
    int y;
    cin>>y;
    seg.set(i,pii{y,i});
  }
  while(1){
    int R=N;
    auto s=seg.prod(0,R);
    int y=s.first;
    R=s.second;
    // cerr<<R<<' '<<y<<endl;
    if(y==INF)break;
    seg.set(s.second,seg_e());
    int x=s.second;
    while(s.first!=INF){
      s=seg.prod(0,R);
      seg.set(s.second,seg_e());
      R=s.second;
      if(s.first!=INF)x=s.second;
    }
    cout<<x+1<<' '<<y<<'\n';
  }
}