#include <bits/stdc++.h>
using namespace std;
int n, m, Q, op, x, head[100010], o = 0, a[100010];
long long dis[100010];
bool vis[100010];
struct edge {
  int to, link, w;
} e[100010];
void add_edge(int u, int v, int w) {
  e[++o].to = v, e[o].link = head[u], head[u] = o, e[o].w = w;
}
struct node {
  int id;
  long long w;
  bool operator<(const node &b) const { return w > b.w; }
};
void dijk() {
  priority_queue<node> q;
  for (int i = 1; i <= n; i++) dis[i] = 1e18;
  q.push((node){1, dis[1] = 0});
  while (!q.empty()) {
    node now = q.top();
    q.pop();
    if (vis[now.id]) continue;
    vis[now.id] = true;
    for (int i = head[now.id]; i; i = e[i].link) {
      if (dis[e[i].to] > dis[now.id] + e[i].w) {
        dis[e[i].to] = dis[now.id] + e[i].w;
        q.push((node){e[i].to, dis[e[i].to]});
      }
    }
  }
}
queue<int> q[100010];
void bfs() {
  for (int i = 1; i <= n; i++) a[i] = 2e9;
  a[1] = 0, q[0].push(1);
  for (int i = 0, ed = 0; i <= ed; i++) {
    while (!q[i].empty()) {
      int now = q[i].front();
      q[i].pop();
      if (a[now] < i) continue;
      for (int j = head[now]; j; j = e[j].link) {
        int c = dis[now] + e[j].w - dis[e[j].to];
        if (a[e[j].to] > a[now] + c) {
          a[e[j].to] = a[now] + c;
          if (a[e[j].to] <= min(x, n - 1)) {
            q[a[e[j].to]].push(e[j].to);
            ed = max(ed, a[e[j].to]);
          }
        }
      }
    }
  }
}
int main() {
  scanf("%d %d %d", &n, &m, &Q);
  for (int i = 1, u, v, w; i <= m; i++)
    scanf("%d %d %d", &u, &v, &w), add_edge(u, v, w);
  dijk();
  while (Q--) {
    scanf("%d %d", &op, &x);
    if (op == 1) printf("%lld\n", dis[x] >= 1e18 ? -1 : dis[x]);
    if (op == 2) {
      for (int i = 1, id; i <= x; i++) scanf("%d", &id), e[id].w++;
      bfs();
      for (int i = 1; i <= n; i++)
        dis[i] = min(1000000000000000000ll, dis[i] + a[i]);
    }
  }
}
