#include <bits/stdc++.h>
using namespace std;
struct node {
  long long v, next, w;
} g[200005];
long long head[200005], cnt;
void add(long long u, long long v, long long w) {
  g[++cnt] = (node){v, head[u], w};
  head[u] = cnt;
}
long long n, m, Q;
long long dis[100005];
long long ad[100005];
void dijkstra() {
  priority_queue<pair<long long, long long> > q;
  for (long long i = 1; i <= n; i++) dis[i] = 10000000000000000ll;
  q.push(make_pair(0, 1));
  dis[1] = 0;
  while (!q.empty()) {
    long long u = q.top().second;
    q.pop();
    for (long long i = head[u]; i; i = g[i].next) {
      long long v = g[i].v, w = g[i].w;
      if (dis[v] > dis[u] + w) {
        dis[v] = dis[u] + w;
        q.push(make_pair(-dis[v], v));
      }
    }
  }
}
queue<long long> p[100005];
long long x, y, z, k, cmd;
void new_dijkstra(long long k) {
  long long maxv = 0;
  for (long long i = 1; i <= n; i++) ad[i] = 10000000000000000ll;
  ad[1] = 0;
  p[0].push(1);
  for (long long i = 0; i <= maxv; i++) {
    while (!p[i].empty()) {
      long long u = p[i].front();
      p[i].pop();
      if (ad[u] < i) continue;
      for (long long j = head[u]; j; j = g[j].next) {
        long long v = g[j].v, w = g[j].w;
        long long t = ad[u] + dis[u] - dis[v] + w;
        if (ad[v] > t) {
          ad[v] = t;
          if (t <= min(k, n - 1)) {
            p[t].push(v);
            maxv = max(maxv, t);
          }
        }
      }
    }
  }
  for (long long i = 1; i <= n; i++)
    dis[i] = min(10000000000000000ll, dis[i] + ad[i]);
}
int main() {
  scanf("%lld%lld%lld", &n, &m, &Q);
  for (long long i = 1; i <= m; i++) {
    scanf("%lld%lld%lld", &x, &y, &z);
    add(x, y, z);
  }
  dijkstra();
  for (int i = 1; i <= Q; i++) {
    scanf("%lld", &cmd);
    if (cmd == 1) {
      scanf("%lld", &x);
      if (dis[x] < 10000000000000000ll)
        printf("%lld\n", dis[x]);
      else
        puts("-1");
    } else {
      scanf("%lld", &k);
      for (long long i = 1; i <= k; i++) {
        scanf("%lld", &x);
        g[x].w++;
      }
      new_dijkstra(k);
    }
  }
}
