#include <bits/stdc++.h>
using namespace std;
const int N = 100005;
const long long INF = 0X3F3F3F3F3F3F3F3FLL;
int n, m, Q, dis[N];
long long d[N];
int pp, lnk[N], nxt[N], to[N], we[N];
void ae(int k1, int k2, int k3) {
  to[++pp] = k2, we[pp] = k3, nxt[pp] = lnk[k1], lnk[k1] = pp;
}
void dij() {
  priority_queue<pair<long long, int> > q;
  auto push = [&](int x) { q.emplace(-d[x], x); };
  vector<bool> vis(n + 1);
  memset(d, 63, sizeof(d)), d[1] = 0;
  push(1);
  while (!q.empty()) {
    int k1 = q.top().second;
    q.pop();
    if (vis[k1]) continue;
    vis[k1] = 1;
    for (int i = lnk[k1]; i; i = nxt[i])
      if (d[k1] + we[i] < d[to[i]]) {
        d[to[i]] = d[k1] + we[i];
        push(to[i]);
      }
  }
  for (int k1 = (1); k1 <= (n); ++k1)
    for (int i = lnk[k1]; i; i = nxt[i]) {
      we[i] -= d[to[i]] - d[k1];
    }
}
vector<int> A[N];
void redij() {
  for (int i = (0); i <= (n); ++i) A[i].clear();
  memset(dis, 63, sizeof(dis));
  dis[1] = 0, A[0].emplace_back(1);
  for (int cur = (0); cur <= (n); ++cur) {
    for (int _ = (0); _ <= (((int)(A[cur]).size()) - 1); ++_) {
      int k1 = A[cur][_];
      if (dis[k1] != cur) continue;
      for (int i = lnk[k1]; i; i = nxt[i]) {
        if (dis[k1] + we[i] < dis[to[i]]) {
          if ((dis[to[i]] = dis[k1] + we[i]) <= n) {
            A[dis[to[i]]].emplace_back(to[i]);
          }
        }
      }
    }
  }
  for (int k1 = (1); k1 <= (n); ++k1) d[k1] += dis[k1];
  for (int k1 = (1); k1 <= (n); ++k1)
    for (int i = lnk[k1]; i; i = nxt[i]) we[i] -= dis[to[i]] - dis[k1];
}
int main() {
  scanf("%d%d%d", &n, &m, &Q);
  for (int i = (1); i <= (m); ++i) {
    int k1, k2, k3;
    scanf("%d%d%d", &k1, &k2, &k3);
    ae(k1, k2, k3);
  }
  dij();
  for (int _ = (1); _ <= (Q); ++_) {
    int o, k1;
    scanf("%d%d", &o, &k1);
    if (o == 1) {
      printf("%lld\n", d[k1] > 1e18 ? -1LL : d[k1]);
    } else {
      for (int i = (1); i <= (k1); ++i) {
        int k2;
        scanf("%d", &k2);
        ++we[k2];
      }
      redij();
    }
  }
  return 0;
}
