#include <bits/stdc++.h>
using namespace std;
const int N = 100010;
int Begin[N], Next[N], to[N], cost[N], e;
void Add(int u, int v, int w) {
  to[++e] = v, Next[e] = Begin[u], Begin[u] = e, cost[e] = w;
}
int n, m;
long long dis[N];
bool vis[N];
struct Vertex {
  int o;
  long long d;
  bool operator<(const Vertex& A) const { return d > A.d; }
};
void Dijkstra() {
  priority_queue<Vertex> q;
  memset(dis, 0x3f, sizeof dis);
  q.push((Vertex){1, 0}), dis[1] = 0;
  while (!q.empty()) {
    Vertex v = q.top();
    q.pop();
    int o = v.o;
    if (vis[o]) continue;
    vis[o] = true;
    for (int i = Begin[o]; i; i = Next[i]) {
      int u = to[i];
      if (dis[u] > dis[o] + cost[i]) {
        dis[u] = dis[o] + cost[i];
        q.push((Vertex){u, dis[u]});
      }
    }
  }
}
int delt[N];
queue<int> que[N];
void Work(int s) {
  for (int i = 1; i <= n; i++) delt[i] = 1e9, vis[i] = false;
  que[0].push(1), delt[1] = 0;
  for (int i = 0; i <= s; i++)
    while (!que[i].empty()) {
      int o = que[i].front();
      que[i].pop();
      if (vis[o]) continue;
      vis[o] = true;
      for (int j = Begin[o]; j; j = Next[j]) {
        int u = to[j];
        int new_delt = dis[o] + delt[o] + cost[j] - dis[u];
        if (delt[u] > new_delt) {
          delt[u] = new_delt;
          if (delt[u] <= s) que[delt[u]].push(u);
        }
      }
    }
  for (int i = 1; i <= n; i++) dis[i] += delt[i];
};
int q;
int main() {
  scanf("%d%d%d", &n, &m, &q);
  for (int i = 1; i <= m; i++) {
    int u, v, c;
    scanf("%d%d%d", &u, &v, &c);
    Add(u, v, c);
  }
  Dijkstra();
  while (q--) {
    int ty, s;
    scanf("%d%d", &ty, &s);
    if (ty == 1)
      printf("%I64d\n", dis[s] > 1e17 ? -1 : dis[s]);
    else {
      for (int i = 1; i <= s; i++) {
        int u;
        scanf("%d", &u);
        ++cost[u];
      }
      Work(min(s, n));
    }
  }
  return 0;
}
