#include <bits/stdc++.h>
using namespace std;
inline int read(int x = 0, int f = 1, char ch = '0') {
  while (!isdigit(ch = getchar()))
    if (ch == '-') f = -1;
  while (isdigit(ch)) x = x * 10 + ch - '0', ch = getchar();
  return f * x;
}
const int N = 1e5 + 5;
int head[N], ver[N], nxt[N], edge[N];
int n, m, Q, tot;
long long d[N], f[N], t;
bool v[N];
inline void add(int x, int y, int z) {
  ver[++tot] = y;
  nxt[tot] = head[x];
  head[x] = tot;
  edge[tot] = z;
}
inline void dij() {
  priority_queue<pair<long long, int> > q;
  memset(d, 0x3f, sizeof(d));
  d[1] = 0;
  q.push(make_pair(0, 1));
  while (q.size()) {
    int x = q.top().second;
    q.pop();
    if (v[x]) continue;
    v[x] = 1;
    for (register int i = head[x]; i; i = nxt[i]) {
      int y = ver[i];
      if (d[y] <= d[x] + edge[i]) continue;
      d[y] = d[x] + edge[i];
      q.push(make_pair(-d[y], y));
    }
  }
}
queue<int> q[N];
inline void work(int maxn) {
  memset(f, 0x3f, sizeof(f));
  f[1] = 0;
  q[0].push(1);
  for (register int now = 0; now <= t; ++now)
    while (q[now].size()) {
      int x = q[now].front();
      q[now].pop();
      if (f[x] < now) continue;
      for (register int i = head[x]; i; i = nxt[i]) {
        int y = ver[i], z = d[x] + edge[i] - d[y];
        if (f[y] <= f[x] + z) continue;
        f[y] = f[x] + z;
        if (f[y] > maxn) continue;
        q[f[y]].push(y);
        t = max(t, f[y]);
      }
    }
  for (register int i = (1); i <= (n); ++i) d[i] = min(d[0], d[i] + f[i]);
}
int main() {
  n = read();
  m = read();
  Q = read();
  for (register int i = (1); i <= (m); ++i) {
    int x = read(), y = read(), z = read();
    add(x, y, z);
  }
  dij();
  while (Q--) {
    int op = read();
    if (op == 1) {
      int x = read();
      printf("%lld\n", d[x] >= d[0] ? -1 : d[x]);
    } else {
      int c = read(), k;
      for (register int i = (1); i <= (c); ++i) k = read(), ++edge[k];
      work(min(c, n - 1));
    }
  }
  return 0;
}
