#include <bits/stdc++.h>
using namespace std;
const int M = 1e5 + 10;
const long long INF = 1e15 + 10;
int n, m, q;
long long dist[M], e[M], up[M];
set<pair<long long, int> > s;
vector<pair<int, int> > g[M];
queue<int> saf[M];
void dijkstra() {
  fill(dist + 2, dist + n + 1, INF);
  s.insert({0, 1});
  for (int i = 0; i < n; i++) {
    int u = (*s.begin()).second;
    s.erase(*s.begin());
    for (auto v : g[u])
      if (dist[v.second] > dist[u] + e[v.first]) {
        s.erase({dist[v.second], v.second});
        dist[v.second] = dist[u] + e[v.first];
        s.insert({dist[v.second], v.second});
      }
  }
}
void update(int k) {
  fill(up + 2, up + n + 1, k + 1);
  saf[0].push(1);
  for (int d = 0; d <= k; d++)
    while (saf[d].size()) {
      int v = saf[d].front();
      saf[d].pop();
      if (up[v] < d) continue;
      for (auto u : g[v]) {
        long long x = up[v] - dist[u.second] + dist[v] + e[u.first];
        if (x < up[u.second]) {
          up[u.second] = x;
          saf[up[u.second]].push(u.second);
        }
      }
    }
  for (int i = 2; i <= n; i++) dist[i] = min(INF, dist[i] + up[i]);
}
int main() {
  cin >> n >> m >> q;
  for (int i = 1; i <= m; i++) {
    int u, v, w;
    scanf("%d%d%d", &u, &v, &w);
    g[u].push_back({i, v});
    e[i] = w;
  }
  dijkstra();
  while (q--) {
    int t, k, x;
    scanf("%d%d", &t, &k);
    if (t == 1)
      cout << (dist[k] >= INF ? -1 : dist[k]) << endl;
    else {
      for (int i = 0; i < k; i++) scanf("%d", &x), e[x]++;
      update(min(n - 1, k));
    }
  }
  return 0;
}
