#include <bits/stdc++.h>
using namespace std;
int n, m, q, i1[333333], i2[333333], qa[333333], qb[333333];
int M = 0, fst[333333], vb[333333], nxt[333333], vc[333333];
int ad_de(int a, int b, int c) {
  ++M;
  nxt[M] = fst[a];
  fst[a] = M;
  vb[M] = b;
  vc[M] = c;
  return M;
}
long long dist[333333], od[333333];
void dj() {
  priority_queue<pair<long long, int>, vector<pair<long long, int> >,
                 greater<pair<long long, int> > >
      pq;
  for (int i = 1; i <= n; ++i) dist[i] = 1e18;
  dist[1] = 0;
  pq.push(pair<long long, int>(0, 1));
  while (!pq.empty()) {
    pair<long long, int> t = pq.top();
    pq.pop();
    if (t.first != dist[t.second]) continue;
    int x = t.second;
    for (int e = fst[x]; e; e = nxt[e]) {
      int b = vb[e];
      if (dist[b] <= dist[x] + vc[e]) continue;
      dist[b] = dist[x] + vc[e];
      pq.push(pair<long long, int>(dist[b], b));
    }
  }
}
int tp[3333333], ns[3333333], xx[3333333], C = 0;
void dj2(int s) {
  C = 0;
  for (int i = 0; i <= s; ++i) tp[i] = 0;
  for (int i = 1; i <= n; ++i) od[i] = dist[i], dist[i] = 1e18;
  dist[1] = 0;
  ++C;
  xx[C] = 1;
  ns[C] = 0;
  tp[0] = C;
  for (int i = 0; i <= s; ++i) {
    while (tp[i]) {
      int x = xx[tp[i]];
      tp[i] = ns[tp[i]];
      if (dist[x] != i) continue;
      for (int e = fst[x]; e; e = nxt[e]) {
        int b = vb[e];
        long long vv = vc[e] - od[b] + od[x];
        if (dist[b] <= dist[x] + vv) continue;
        dist[b] = dist[x] + vv;
        if (dist[b] <= s) ++C, ns[C] = tp[dist[b]], xx[C] = b, tp[dist[b]] = C;
      }
    }
  }
  for (int i = 1; i <= n; ++i) {
    dist[i] += od[i];
    if (dist[i] > 1e18) dist[i] = 1e18;
  }
}
int main() {
  scanf("%d%d%d", &n, &m, &q);
  for (int i = 1; i <= m; ++i) {
    int a, b, c;
    scanf("%d%d%d", &a, &b, &c);
    i1[i] = ad_de(a, b, c);
  }
  dj();
  int shi = 0;
  for (int i = 1; i <= q; ++i) {
    int t, x;
    scanf("%d%d", &t, &x);
    if (t == 1) {
      if (shi) dj2(shi), shi = 0;
      long long d = dist[x], op;
      if (d > 1e17)
        op = -1;
      else
        op = d;
      printf("%lld\n", op);
    } else {
      while (x--) {
        int p;
        scanf("%d", &p);
        ++vc[i1[p]];
        ++shi;
      }
    }
  }
}
