#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e5 + 10;
const long long inf = 1e18 + 1000;
struct gg {
  long long u, v, w, next;
} side[maxn * 2];
int cnt, head[maxn];
int id[maxn];
void ins(int u, int v, int w) {
  side[++cnt] = (gg){u, v, w, head[u]};
  head[u] = cnt;
}
priority_queue<pair<long long, long long>, vector<pair<long long, long long> >,
               greater<pair<long long, long long> > >
    q;
long long dis[maxn], oridis[maxn];
int n, m;
vector<int> buc[(int)(1e6 + 100)];
void dij2() {
  memset(dis, 0x3f, sizeof(dis));
  dis[1] = 0;
  for (int i = (0), iend = (1e6); i <= iend; i++) buc[i].clear();
  buc[0].push_back(1);
  for (int i = (0), iend = ((int)(1e6)); i <= iend; i++) {
    while (buc[i].size()) {
      int u = buc[i][buc[i].size() - 1];
      buc[i].pop_back();
      if (dis[u] < i) continue;
      for (int k = head[u]; k; k = side[k].next) {
        int v = side[k].v;
        if (dis[v] > dis[u] + side[k].w) {
          dis[v] = dis[u] + side[k].w;
          if (dis[v] <= 1e6) buc[dis[v]].push_back(v);
        }
      }
    }
  }
}
void dij1() {
  memset(dis, 0x3f, sizeof(dis));
  dis[1] = 0;
  q.push(make_pair(dis[1], 1));
  while (!q.empty()) {
    int len = q.top().first, u = q.top().second;
    q.pop();
    if (len > dis[u]) continue;
    for (int i = head[u]; i; i = side[i].next) {
      int v = side[i].v;
      if (dis[v] > dis[u] + side[i].w) {
        dis[v] = dis[u] + side[i].w;
        q.push(make_pair(dis[v], v));
      }
    }
  }
  for (int i = (1), iend = (m); i <= iend; i++) {
    int new_w = side[id[i]].w + dis[side[id[i]].u] - dis[side[id[i]].v];
    side[id[i]].w = new_w;
  }
  memcpy(oridis, dis, sizeof(dis));
  dij2();
}
int main() {
  ios::sync_with_stdio(0);
  int q;
  cin >> n >> m >> q;
  for (int i = (1), iend = (m); i <= iend; i++) {
    int u, v, w;
    cin >> u >> v >> w;
    ins(u, v, w);
    id[i] = cnt;
  }
  dij1();
  for (int i = (1), iend = (q); i <= iend; i++) {
    int ty, v;
    cin >> ty >> v;
    if (ty == 1) {
      if (oridis[v] > inf) {
        cout << "-1" << endl;
        continue;
      }
      dij2();
      cout << oridis[v] + dis[v] << endl;
    } else {
      for (int i = (1), iend = (v); i <= iend; i++) {
        int l;
        cin >> l;
        side[id[l]].w++;
      }
    }
  }
  return 0;
}
