#include <bits/stdc++.h>
using namespace std;
int n, m, q;
vector<pair<int, long long> > G[200416];
priority_queue<pair<long long, int> > Q;
long long dis[200416];
int vis[200416];
void dijk() {
  Q.push(make_pair(0, 1));
  memset(dis, 0x3f3f, sizeof dis);
  dis[1] = 0;
  while (!Q.empty()) {
    int u = Q.top().second;
    Q.pop();
    if (vis[u]) continue;
    vis[u] = 1;
    for (auto &t : G[u]) {
      int v = t.first;
      if (dis[v] > dis[u] + t.second)
        dis[v] = dis[u] + t.second, Q.push(make_pair(-dis[v], v));
    }
  }
}
pair<int, int> ed[200416];
long long d[200416];
vector<int> que[1000006];
void dij() {
  que[0].push_back(1);
  memset(d, 0x3f3f, sizeof d);
  memset(vis, 0, sizeof vis);
  d[1] = 0;
  for (int cur = 0; cur <= 1000000; ++cur) {
    while (!que[cur].empty()) {
      int u = que[cur].back();
      que[cur].pop_back();
      if (vis[u]) continue;
      vis[u] = 1;
      for (auto &t : G[u]) {
        int v = t.first;
        if (d[v] > d[u] + t.second) {
          d[v] = d[u] + t.second;
          if (d[v] <= 1000000) que[d[v]].push_back(v);
        }
      }
    }
  }
}
void solve() {
  cin >> n >> m >> q;
  for (int i = (1), iend = (m); i <= iend; ++i) {
    static int u, v, w;
    scanf("%d%d%d", &u, &v, &w);
    ed[i] = make_pair(u, G[u].size());
    G[u].emplace_back(make_pair(v, w));
  }
  dijk();
  for (int i = (1), iend = (n); i <= iend; ++i)
    for (auto &t : G[i]) t.second += dis[i] - dis[t.first];
  int opt, c, e;
  for (int i = (1), iend = (q); i <= iend; ++i) {
    scanf("%d", &opt);
    if (opt == 1) {
      dij();
      scanf("%d", &c);
      printf("%lld\n", d[c] + dis[c] > 1e18 ? -1 : d[c] + dis[c]);
    } else {
      scanf("%d", &c);
      for (int j = (1), jend = (c); j <= jend; ++j) {
        scanf("%d", &e);
        ++G[ed[e].first][ed[e].second].second;
      }
    }
  }
}
signed main() { solve(); }
