#include <bits/stdc++.h>
using namespace std;
const long long N = 1e5 + 10, inf = 1e18;
vector<pair<int, int> > G[N];
pair<int, int> e[N];
int n, m, q, inqueue[N], change = 0;
long long d[N];
void read() {
  scanf("%d %d %d", &n, &m, &q);
  for (int i = 1, u, v, w; i <= m; i++) {
    scanf("%d %d %d", &u, &v, &w);
    G[u].push_back(make_pair(v, w));
    e[i] = make_pair(u, (int)G[u].size() - 1);
  }
}
void build() {
  for (int i = 2; i <= n; i++) d[i] += change + 1;
  inqueue[1] = 1;
  deque<int> q;
  q.push_back(1);
  int cnt = 0;
  while (!q.empty()) {
    int u;
    cnt++;
    if (cnt & 1) {
      u = q.front();
      q.pop_front();
    } else {
      u = q.back();
      q.pop_back();
    }
    inqueue[u] = 0;
    for (pair<int, int> v : G[u])
      if (d[u] + v.second < d[v.first]) {
        d[v.first] = d[u] + v.second;
        if (!inqueue[v.first]) {
          inqueue[v.first] = 1;
          q.push_back(v.first);
        }
      }
  }
}
void process() {
  for (int i = 2; i <= n; i++) d[i] = inf;
  build();
  for (int i = 1, t, x; i <= q; i++) {
    scanf("%d %d", &t, &x);
    if (t == 1) {
      if (d[x] >= inf)
        cout << "-1\n";
      else {
        if (change) {
          build();
          change = 0;
        }
        cout << d[x] << "\n";
      }
    } else {
      change += x;
      for (int j = 1, c; j <= x; j++) {
        scanf("%d", &c);
        G[e[c].first][e[c].second].second++;
      }
    }
  }
}
int main() {
  ios::sync_with_stdio(false);
  cout.tie(0);
  read();
  process();
  return 0;
}
