#include <bits/stdc++.h>
using namespace std;
vector<pair<int, int>> g[100012];
int m, n, q;
vector<pair<int, int>> b;
long long d[100012], diff[100012];
vector<int> buf[100012];
void dijkstra() {
  fill(d + 1, d + n + 1, 1e18);
  d[1] = 0;
  priority_queue<pair<long long, int>> pq;
  pq.push({0, 1});
  while (pq.size()) {
    int u = pq.top().second, val = -pq.top().first;
    pq.pop();
    if (d[u] < val) continue;
    for (auto v : g[u])
      if (d[v.first] > d[u] + v.second) {
        d[v.first] = d[u] + v.second;
        pq.push({-d[v.first], v.first});
      }
  }
}
void recalc() {
  fill(diff + 1, diff + n + 1, 100000);
  diff[1] = 0;
  buf[0].push_back(1);
  for (int i = 0; i <= n; i++) {
    for (int j = 0; j < buf[i].size(); j++) {
      int u = buf[i][j];
      if (diff[u] != i) continue;
      for (auto v : g[u])
        if (diff[v.first] > diff[u] + v.second - d[v.first] + d[u]) {
          diff[v.first] = diff[u] + v.second - d[v.first] + d[u];
          if (diff[v.first] <= n) buf[diff[v.first]].push_back(v.first);
        }
    }
    buf[i].clear();
  }
  for (int i = 1; i <= n; i++)
    if (diff[i] < 100000) d[i] += diff[i];
}
int main(int argc, char *argv[]) {
  cin >> n >> m >> q;
  for (int i = 1; i <= m; i++) {
    int x, y, w;
    cin >> x >> y >> w;
    b.push_back({x, g[x].size()});
    g[x].push_back({y, w});
  }
  dijkstra();
  while (q--) {
    int k;
    cin >> k;
    if (k == 1) {
      int x;
      cin >> x;
      if (d[x] >= 1e18)
        cout << -1 << '\n';
      else
        cout << d[x] << '\n';
    } else {
      int cnt = 0;
      cin >> cnt;
      for (int i = 0; i < cnt; i++) {
        int x;
        cin >> x;
        x--;
        g[b[x].first][b[x].second].second++;
      }
      recalc();
    }
  }
  return 0;
}
