#include <bits/stdc++.h>
using namespace std;
int go[100004];
namespace IO {
char *p1, *p2, buf[100000];
inline int rd() {
  int x = 0;
  char c =
      (p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, 100000, stdin), p1 == p2)
           ? EOF
           : *p1++);
  while (c < 48) {
    c = (p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, 100000, stdin), p1 == p2)
             ? EOF
             : *p1++);
  }
  while (c > 47) {
    x = (((x << 2) + x) << 1) + (c ^ 48),
    c = (p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, 100000, stdin), p1 == p2)
             ? EOF
             : *p1++);
  }
  return x;
}
inline void setIO(string s) {
  string in = s + ".in";
  string out = s + ".out";
  freopen(in.c_str(), "r", stdin);
  freopen(out.c_str(), "w", stdout);
}
};  // namespace IO
long long d[100004];
vector<int> G[100004];
int n, m, Q, done[100004], inq[100004];
struct edge {
  long long val;
  int u, v;
} ee[100004];
deque<int> q;
void dijkstra() {
  for (int i = 1; i <= n; ++i) d[i] = 1000000000000000, inq[i] = 0;
  d[1] = 0, inq[1] = 1;
  q.push_back(1);
  while (!q.empty()) {
    int u = q.front();
    q.pop_front();
    for (int i = G[u].size() - 1; i >= 0; --i) {
      edge e = ee[G[u][i]];
      inq[e.u] = 0;
      if (d[e.v] > d[u] + e.val) {
        d[e.v] = d[u] + e.val;
        if (!inq[e.v]) {
          if (q.empty() || d[e.v] < d[q.front()])
            q.push_front(e.v);
          else
            q.push_back(e.v);
          inq[e.v] = 1;
        }
      }
    }
  }
}
int main() {
  int i, j, flag = 1;
  n = IO::rd();
  m = IO::rd();
  Q = IO::rd();
  for (i = 1; i <= m; ++i) {
    ee[i].u = IO::rd();
    ee[i].v = IO::rd();
    ee[i].val = IO::rd();
    G[ee[i].u].push_back(i);
  }
  dijkstra();
  for (i = 1; i <= n; ++i)
    if (d[i] == 1000000000000000)
      go[i] = 0;
    else
      go[i] = 1;
  for (i = 1; i <= Q; ++i) {
    int opt, pp;
    opt = IO::rd();
    pp = IO::rd();
    if (opt == 2) {
      for (j = 1; j <= pp; ++j) {
        int x = IO::rd();
        ++ee[x].val;
      }
      flag = 0;
    } else {
      if (!go[pp]) {
        printf("-1\n");
      } else {
        if (!flag) {
          flag = 1;
          dijkstra();
        }
        printf("%lld\n", d[pp]);
      }
    }
  }
  return 0;
}
