#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 7;
int n, m, Q, head[N], edge_id;
long long dis[N];
struct node {
  int to, next, val;
} e[N];
void add_edge(int u, int v, int val) {
  ++edge_id, e[edge_id].next = head[u], e[edge_id].val = val, e[edge_id].to = v,
             head[u] = edge_id;
}
bool vis[N];
void dijkstra() {
  fill(dis + 1, dis + n + 1, 1e16);
  priority_queue<pair<long long, int>> q;
  dis[1] = 0, q.push(make_pair(0, 1));
  while (!q.empty()) {
    int u = q.top().second;
    q.pop();
    if (vis[u]) continue;
    vis[u] = 1;
    for (int i = head[u]; i; i = e[i].next) {
      int v = e[i].to;
      if (dis[v] > dis[u] + e[i].val) {
        dis[v] = dis[u] + e[i].val;
        q.push(make_pair(-dis[v], v));
      }
    }
  }
}
queue<int> q[N];
int d[N];
void bfs(int maxn) {
  for (int i = 0, iE = maxn; i <= iE; i++)
    while (!q[i].empty()) {
      int u = q[i].front();
      q[i].pop();
      if (d[u] < i) continue;
      for (int i = head[u]; i; i = e[i].next) {
        int v = e[i].to;
        long long qwq = dis[u] + e[i].val + d[u] - dis[v];
        if (qwq > maxn) continue;
        if (d[v] > qwq) d[v] = qwq, q[qwq].push(v);
      }
    }
}
int main() {
  scanf("%d%d%d", &n, &m, &Q);
  for (int i = 1, iE = m; i <= iE; i++) {
    int u, v, val;
    scanf("%d%d%d", &u, &v, &val);
    add_edge(u, v, val);
  }
  dijkstra();
  while (Q--) {
    int opt, x;
    scanf("%d%d", &opt, &x);
    if (opt == 1) {
      if (dis[x] > 1e15)
        printf("-1\n");
      else
        printf("%lld\n", dis[x]);
      continue;
    }
    for (int i = 1, iE = x; i <= iE; i++) {
      int t;
      scanf("%d", &t);
      e[t].val++;
    }
    fill(d + 1, d + n + 1, 1e9);
    q[0].push(1), d[1] = 0;
    bfs(x);
    for (int i = 1, iE = n; i <= iE; i++) dis[i] += d[i];
  }
  return 0;
}
