#include <bits/stdc++.h>
using namespace std;
inline int read() {
  int w = 1, s = 0;
  char ch = getchar();
  while (!isdigit(ch)) {
    if (ch == '-') w = -1;
    ch = getchar();
  }
  while (isdigit(ch)) {
    s = s * 10 + ch - '0';
    ch = getchar();
  }
  return w * s;
}
struct node {
  int to, next;
  long long w;
} e[1000010];
int n, m, q, h[1000100], tot;
long long dis[1000010];
int delta[101000];
inline void add(int from, int to, int w) {
  e[++tot].next = h[from];
  h[from] = tot;
  e[tot].to = to;
  e[tot].w = w;
}
priority_queue<pair<long long, int>, vector<pair<long long, int> >,
               greater<pair<long long, int> > >
    Q;
inline void Dij() {
  memset(dis, 0x3f, sizeof(dis));
  Q.push(make_pair(0, 1));
  dis[1] = 0;
  while (!Q.empty()) {
    pair<long long, int> tmp = Q.top();
    Q.pop();
    int u = tmp.second;
    if (dis[u] != tmp.first) continue;
    for (register int i = h[u]; i; i = e[i].next) {
      int to = e[i].to;
      if (dis[to] > dis[u] + e[i].w) {
        dis[to] = dis[u] + e[i].w;
        Q.push(make_pair(dis[to], to));
      }
    }
  }
}
queue<int> vec[100010];
int Max, k;
inline void Update() {
  memset(delta, 0x3f, sizeof(delta));
  delta[1] = 0;
  vec[0].push(1);
  Max = 0;
  for (register int i = 0; i <= Max; ++i) {
    while (!vec[i].empty()) {
      int u = vec[i].front();
      vec[i].pop();
      if (delta[u] < i) continue;
      for (register int j = h[u]; j; j = e[j].next) {
        int to = e[j].to;
        long long d = -dis[to] + dis[u] + e[j].w;
        if (delta[to] > delta[u] + d) {
          delta[to] = delta[u] + d;
          if (delta[to] <= min(k, n - 1))
            vec[delta[to]].push(to), Max = max(Max, delta[to]);
        }
      }
    }
  }
  for (register int i = 1; i <= n; ++i) dis[i] = dis[i] + delta[i];
}
int main() {
  n = read(), m = read(), q = read();
  for (register int i = 1; i <= m; ++i) {
    int u = read(), v = read(), w = read();
    add(u, v, w);
  }
  Dij();
  for (register int i = 1; i <= q; ++i) {
    int op = read();
    if (op == 1) {
      int x = read();
      if (dis[x] > 1e15) {
        cout << "-1\n";
        continue;
      }
      cout << dis[x] << "\n";
    } else {
      k = read();
      Max = k;
      for (register int i = 1; i <= k; ++i) {
        int x = read();
        e[x].w += 1;
      }
      Update();
    }
  }
  return 0;
}
