import std.conv, std.functional, std.range, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, std.regex, std.typecons;
import core.bitop;

class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }

string COLOR(string s = "") { return "\x1b[" ~ s ~ "m"; }

bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }

int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }


void bAdd(T)(T[] bit, int pos, T val)
in {
  assert(0 <= pos && pos < bit.length, "bAdd: 0 <= pos < |bit| must hold");
}
do {
  for (int x = pos; x < bit.length; x |= x + 1) {
    bit[x] += val;
  }
}

// sum of [0, pos)
T bSum(T)(T[] bit, int pos)
in {
  assert(0 <= pos && pos <= bit.length, "bSum: 0 <= pos <= |bit| must hold");
}
do {
  T ret = 0;
  for (int x = pos - 1; x >= 0; x = (x & (x + 1)) - 1) {
    ret += bit[x];
  }
  return ret;
}

// min pos s.t. pred(sum of [0, pos))
//   assume pred(sum of [0, pos)) is non-decreasing
int bBinarySearch(alias pred, T)(T[] bit) {
  import core.bitop : bsr;
  import std.functional : unaryFun;
  alias predFun = unaryFun!pred;
  if (predFun(0)) return 0;
  int pos = 0;
  T sum = 0;
  foreach_reverse (e; 0 .. bsr(bit.length) + 1) {
    const x = (pos | 1 << e) - 1;
    if (x < bit.length && !predFun(sum + bit[x])) {
      pos |= 1 << e;
      sum += bit[x];
    }
  }
  return pos + 1;
}


void main() {
  try {
    for (; ; ) {
      const N = readInt;
      const Q = readInt;
      auto A = new long[N];
      foreach (i; 0 .. N) {
        A[i] = readLong;
      }
      auto O = new int[Q];
      auto K = new int[Q];
      auto X = new long[Q];
      foreach (q; 0 .. Q) {
        O[q] = readInt;
        if (O[q] == 1) {
          K[q] = readInt - 1;
          X[q] = readLong;
        } else if (O[q] == 2) {
          //
        } else if (O[q] == 3) {
          K[q] = readInt - 1;
        } else {
          assert(false);
        }
      }
      
      const as = (A ~ X).sort.uniq.array;
      const asLen = cast(int)(as.length);
      debug {
        writeln("as = ", as);
      }
      
      auto bitI = new int[N];
      auto bitJ = new int[asLen];
      auto js = new int[N];
      js[] = -1;
      int[] que;
      
      foreach (i; 0 .. N) {
        const j = as.lowerBound(A[i]);
        js[i] = j;
        que ~= i;
      }
      int getJ(int i) {
        if (~js[i]) {
          return js[i];
        } else {
          const r = bitI.bSum(i);
          return bitJ.bBinarySearch!(sum => (sum >= r + 1)) - 1;
        }
      }
      foreach (q; 0 .. Q) {
        if (O[q] == 1) {
          const i = K[q];
          if (!~js[i]) {
            const j = getJ(i);
            bitI.bAdd(i, -1);
            bitJ.bAdd(j, -1);
            que ~= i;
          }
          js[i] = as.lowerBound(X[q]);
        } else if (O[q] == 2) {
          foreach (i; que) {
            bitI.bAdd(i, +1);
            bitJ.bAdd(js[i], +1);
            js[i] = -1;
          }
          que = [];
        } else if (O[q] == 3) {
          const i = K[q];
          const j = getJ(i);
          writeln(as[j]);
        } else {
          assert(false);
        }
      }
    }
  } catch (EOFException e) {
  }
}