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#ifdef LOCAL
class SS {
   int x[0];
};
extern "C" SS __sanitizer_print_stack_trace();
#define __last_state                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   \
   }                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   \
   ;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   \
   SS x {                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              \
      __sanitizer_print_stack_trace()
#endif
#include <bits/stdc++.h>
#include <chrono>
#include <ext/pb_ds/assoc_container.hpp>
#include <math.h>
using namespace __gnu_pbds;
using namespace std;
#define endl "\n"
#define mp make_pair
#define st first
#define nd second
#define pii pair<int, int>
#define vi vector<int>
#define pb push_back
#define _upgrade ios_base::sync_with_stdio(0), cout.setf(ios::fixed), cout.precision(10), cin.tie(0), cout.tie(0);
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define fwd(i, a, b) for (int i = (a); i < (b); ++i)
#define trav(a, x) for (auto &a : x)
#define all(c) (c).begin(), (c).end()
#define sz(X) (int)((X).size())
typedef long double ld;
typedef unsigned long long ull;
typedef long long ll;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set; // find_by_order(x) <-returns x-th element   order_of_key(x) <- returns order of element x
// mt19937_64 gen(chrono::steady_clock::now().time_since_epoch().count());uniform_int_distribution<int> distr(0, 1e9);auto my_rand = bind(distr, gen); // my_rand() zwraca teraz liczbe z przedzialu [a, b]
#ifdef LOCAL
ostream &operator<<(ostream &out, string str) {
   for (char c : str)
      out << c;
   return out;
}
template <class L, class R> ostream &operator<<(ostream &out, pair<L, R> p) { return out << "(" << p.st << ", " << p.nd << ")"; }
template <class L, class R, class S> ostream &operator<<(ostream &out, tuple<L, R, S> p) {
   auto &[a, b, c] = p;
   return out << "(" << a << ", " << b << ", " << c << ")";
}
template <class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) {
   out << '{';
   for (auto it = a.begin(); it != a.end(); it = next(it))
      out << (it != a.begin() ? ", " : "") << *it;
   return out << '}';
}
void dump() { cerr << "\n"; }
template <class T, class... Ts> void dump(T a, Ts... x) {
   cerr << a << ", ";
   dump(x...);
}
#define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__)
#else
#define debug(...) ;
#endif

#define int long long
typedef array<int, 4> query;
typedef array<int, 3> edge;
const int MAXN = 2e5 + 99;
int colour[MAXN];

void brut(int n, auto &E, auto &W) {
   debug(E, W);
   vector<set<pii>> G(n);
   for (auto [a, b, d] : E) {
      G[a].insert({b, d});
      G[b].insert({a, d});
   }

   function<void(int, int, int, int)> dfs = [&](int x, int p, int dist, int c) {
      if (dist < 0)
         return;
      colour[x] = c;
      for (auto [y, d] : G[x])
         if (y != p)
            dfs(y, x, dist - d, c);
   };

   for (auto [t, a, b, c] : W) {
      if (t == 1) {
         G[a].insert({b, c});
         G[b].insert({a, c});
      }
      if (t == 2) {
         G[a].erase(G[a].lower_bound({b, -1}));
         G[b].erase(G[b].lower_bound({a, -1}));
      }
      if (t == 3)
         dfs(a, -1, b, c);
      if (t == 4)
         cout << colour[a] << endl;
   }
}

void readd(query &q) {
   cin >> q[0];
   static const vector<int> X = {-1, 3, 2, 3, 1};
   rep(i, X[q[0]]) cin >> q[i + 1];

   q[1]--;
   if (q[0] < 3)
      q[2]--;
}

int32_t main() {
   _upgrade;
   int n, m, q;
   cin >> n >> m >> q;
   vector<edge> E(m);
   for (auto &[a, b, d] : E) {
      cin >> a >> b >> d;
      --a, --b;
   }

   vector<query> Q(q);
   for (auto &q : Q)
      readd(q);

   brut(n, E, Q);
}