#include <bits/stdc++.h>
using namespace std;
long long powmod(long long a, long long b) {
  long long res = 1;
  a %= 1000000007;
  for (; b; b >>= 1) {
    if (b & 1) res = res * a % 1000000007;
    a = a * a % 1000000007;
  }
  return res;
}
int gcd(int x, int y) {
  while (y) {
    int t = x % y;
    x = y;
    y = t;
  }
  return x;
}
template <typename T>
inline bool chkmin(T &a, const T &b) {
  return a > b ? a = b, 1 : 0;
}
template <typename T>
inline bool chkmax(T &a, const T &b) {
  return a < b ? a = b, 1 : 0;
}
namespace FastIO {
bool IOError = 0;
inline char NextChar() {
  static char buf[200010], *p1 = buf + 200010, *pend = buf + 200010;
  if (p1 == pend) {
    p1 = buf;
    pend = buf + fread(buf, 1, 200010, stdin);
    if (pend == p1) {
      IOError = 1;
      return -1;
    }
  }
  return *p1++;
}
inline bool Blank(char c) {
  return c == ' ' || c == '\n' || c == '\r' || c == '\t';
}
inline void read(int &x) {
  bool sign = 0;
  char ch = NextChar();
  x = 0;
  for (; Blank(ch); ch = NextChar())
    ;
  if (IOError) return;
  if (ch == '-') sign = 1, ch = NextChar();
  for (; ch >= '0' && ch <= '9'; ch = NextChar()) x = x * 10 + ch - '0';
  if (sign) x = -x;
}
inline void read(long long &x) {
  bool sign = 0;
  char ch = NextChar();
  x = 0;
  for (; Blank(ch); ch = NextChar())
    ;
  if (IOError) return;
  if (ch == '-') sign = 1, ch = NextChar();
  for (; ch >= '0' && ch <= '9'; ch = NextChar()) x = x * 10 + ch - '0';
  if (sign) x = -x;
}
inline void read(double &x) {
  bool sign = 0;
  char ch = NextChar();
  x = 0;
  for (; Blank(ch); ch = NextChar())
    ;
  if (IOError) return;
  if (ch == '-') sign = 1, ch = NextChar();
  for (; ch >= '0' && ch <= '9'; ch = NextChar()) x = x * 10 + ch - '0';
  if (ch == '.') {
    double tmp = 1;
    ch = NextChar();
    for (; ch >= '0' && ch <= '9'; ch = NextChar())
      tmp /= 10.0, x += tmp * (ch - '0');
  }
  if (sign) x = -x;
}
inline void read(char *s) {
  char ch = NextChar();
  for (; Blank(ch); ch = NextChar())
    ;
  if (IOError) return;
  for (; !Blank(ch) && !IOError; ch = NextChar()) *s++ = ch;
  *s = 0;
}
inline void read(char &c) {
  for (c = NextChar(); Blank(c); c = NextChar())
    ;
  if (IOError) {
    c = -1;
    return;
  }
}
}  // namespace FastIO
using namespace FastIO;
bitset<4096> a[100005];
vector<pair<int, int> > b[100005];
int main() {
  int n, k, q;
  read(n), read(k), read(q);
  for (int i = 0; i < k; i++) {
    for (int j = 0; j < n; j++) {
      int x;
      read(x);
      b[j].push_back(pair<int, int>(x, i));
    }
    for (int j = 0; j < 4096; j++) a[i][j] = j >> i & 1;
  }
  for (int i = 0; i < n; i++) sort(b[i].begin(), b[i].end());
  int t = k;
  for (int i = 0; i < q; i++) {
    int tt, x, y;
    read(tt), read(x), read(y);
    x--, y--;
    if (tt == 1) a[t++] = a[x] | a[y];
    if (tt == 2) a[t++] = a[x] & a[y];
    if (tt == 3) {
      int s = 0;
      for (int j = k - 1; j >= 0; j--) {
        s |= 1 << b[y][j].second;
        if (a[x][s]) {
          printf("%d\n", b[y][j].first);
          break;
        }
      }
    }
  }
  return 0;
}
