#include <bits/stdc++.h>
using namespace std;
const int N = 200050;
const long long inf = 1e15;
struct Edge {
  int v;
  int w;
  Edge() {}
  Edge(int a, int b) {
    v = a;
    w = b;
  }
} edges[2 * N];
long long dist[N];
long long upd[N];
long long y;
struct Node {
  int u;
  inline bool operator<(const Node &b) const { return dist[u] > dist[b.u]; }
  Node() {}
  Node(int a) { u = a; }
};
queue<int> q[N];
priority_queue<Node> pq;
vector<int> Graph[N];
int x, v, w;
void Dijkstra(int n) {
  int i;
  for (i = 2; i <= n; i++) dist[i] = inf;
  pq.push(Node(1));
  while (!pq.empty()) {
    x = pq.top().u;
    pq.pop();
    for (i = 0; i < Graph[x].size(); i++) {
      v = edges[Graph[x][i]].v;
      w = edges[Graph[x][i]].w;
      if (dist[v] > dist[x] + w) {
        dist[v] = dist[x] + w;
        pq.push(Node(v));
      }
    }
  }
}
void Update(int n, int k) {
  int i, j, m = 0;
  for (i = 2; i <= n; i++) upd[i] = inf;
  q[0].push(1);
  for (i = 0; i <= m; i++) {
    while (!q[i].empty()) {
      x = q[i].front();
      q[i].pop();
      if (i > upd[x]) continue;
      for (j = 0; j < Graph[x].size(); j++) {
        v = edges[Graph[x][j]].v;
        w = edges[Graph[x][j]].w;
        y = dist[x] - dist[v] + w + upd[x];
        if (upd[v] > y) {
          upd[v] = y;
          if (y <= k) {
            q[y].push(v);
            if (y > m) m = y;
          }
        }
      }
    }
  }
  for (i = 2; i <= n; i++) {
    dist[i] = min(inf, dist[i] + upd[i]);
  }
}
int main() {
  int n, m, q, i, u, v, t, k, w;
  scanf("%i %i %i", &n, &m, &q);
  for (i = 1; i <= m; i++) {
    scanf("%d %d %d", &u, &v, &w);
    edges[i] = Edge(v, w);
    Graph[u].push_back(i);
  }
  Dijkstra(n);
  while (q--) {
    scanf("%d %d", &t, &k);
    if (t == 1) {
      if (dist[k] == inf)
        printf("-1\n");
      else
        printf("%I64d\n", dist[k]);
    } else {
      for (i = 0; i < k; i++) {
        scanf("%d", &u);
        edges[u].w++;
      }
      if (k >= n) k = n - 1;
      Update(n, k);
    }
  }
  return 0;
}
