#include <bits/stdc++.h>
using namespace std;
template <typename T>
inline T qmin(const T &a, const T &b) {
  return a < b ? a : b;
}
template <typename T>
inline T qmax(const T &a, const T &b) {
  return a > b ? a : b;
}
template <typename T>
inline void getmin(T &a, const T &b) {
  if (a > b) a = b;
}
template <typename T>
inline void getmax(T &a, const T &b) {
  if (a < b) a = b;
}
inline void fileio(string s) {
  freopen((s + ".in").c_str(), "r", stdin);
  freopen((s + ".out").c_str(), "w", stdout);
}
const int inf = (int)1e9 + 7;
const long long linf = (long long)1e17 + 7;
const int N = 1e5 + 7;
int u[N], v[N], w[N], nxt[N];
int head[N];
long long dist[N];
int n, m, q, tot;
priority_queue<pair<long long, int>, vector<pair<long long, int> >,
               greater<pair<long long, int> > >
    pq;
inline void init() {
  pq.push(make_pair(0, 1));
  for (register int i = (2); i <= (n); ++i) dist[i] = linf;
  while (!pq.empty()) {
    pair<long long, int> p = pq.top();
    pq.pop();
    int u = p.second;
    long long d = p.first;
    if (dist[u] != d) continue;
    for (int e = head[u]; e; e = nxt[e]) {
      if (dist[v[e]] <= dist[u] + w[e]) continue;
      dist[v[e]] = dist[u] + w[e];
      pq.push(make_pair(dist[v[e]], v[e]));
    }
  }
  for (register int i = (1); i <= (m); ++i) w[i] -= dist[v[i]] - dist[u[i]];
}
vector<int> pos[1000006];
int tmp[N];
inline void upd() {
  if (!tot) return;
  for (register int i = (2); i <= (n); ++i) tmp[i] = inf;
  for (register int i = (0); i <= (tot); ++i) pos[i].clear();
  pos[0].push_back(1);
  for (register int cur = (0); cur <= (tot); ++cur) {
    for (register int i = 0; i < (pos[cur].size()); ++i) {
      int u = pos[cur][i];
      if (tmp[u] != cur) continue;
      for (int e = head[u]; e; e = nxt[e]) {
        if (tmp[v[e]] <= cur + w[e]) continue;
        tmp[v[e]] = cur + w[e];
        if (tmp[v[e]] <= tot) pos[tmp[v[e]]].push_back(v[e]);
      }
    }
  }
  tot = 0;
  for (register int i = (1); i <= (m); ++i) w[i] -= tmp[v[i]] - tmp[u[i]];
  for (register int i = (2); i <= (n); ++i)
    if (tmp[i] != inf) dist[i] += tmp[i];
}
int main() {
  scanf("%d%d%d", &n, &m, &q);
  for (register int i = (1); i <= (m); ++i) {
    scanf("%d%d%d", u + i, v + i, w + i);
    nxt[i] = head[u[i]];
    head[u[i]] = i;
  }
  init();
  while (q--) {
    int tp;
    scanf("%d", &tp);
    if (tp == 1) {
      int u;
      scanf("%d", &u);
      upd();
      printf("%lld\n", dist[u] == linf ? -1 : dist[u]);
    } else if (tp == 2) {
      int num, c;
      scanf("%d", &num);
      tot += num;
      while (num--) {
        scanf("%d", &c);
        ++w[c];
      }
    } else
      assert(false);
  }
  return 0;
}
