#include <bits/stdc++.h>
using namespace std;
const int N = 100005;
const int M = 1000005;
int n, m, q, pre[N], mcnt;
struct edge {
  int x, w, next;
} e[N];
long long d[N];
int g[N];
bool v[N];
queue<int> que[N];
int main() {
  scanf("%d%d%d", &n, &m, &q);
  memset(pre, -1, sizeof(pre));
  for (int i = 0; i < m; ++i) {
    int x, y, z;
    scanf("%d%d%d", &x, &y, &z);
    e[mcnt] = (edge){y, z, pre[x]}, pre[x] = mcnt++;
  }
  priority_queue<pair<long long, int> > Q;
  memset(d, 0x3f, sizeof(d));
  d[1] = 0;
  Q.push({-d[1], 1});
  while (!Q.empty()) {
    auto it = Q.top();
    Q.pop();
    int x = it.second;
    if (-it.first > d[x]) continue;
    for (int i = pre[x]; ~i; i = e[i].next) {
      int y = e[i].x;
      if (d[x] + e[i].w < d[y]) {
        d[y] = d[x] + e[i].w;
        Q.push({-d[y], y});
      }
    }
  }
  while (q--) {
    int o, k;
    scanf("%d%d", &o, &k);
    if (o == 1) {
      if (d[k] >= d[0]) {
        puts("-1");
      } else {
        printf("%lld\n", d[k]);
      }
    } else {
      int w;
      for (int i = 0; i < k; ++i) {
        scanf("%d", &w);
        e[w - 1].w++;
      }
      memset(g, 0x3f, sizeof(g));
      g[1] = 0;
      que[0].push(1);
      int maxDis = 0;
      for (int dis = 0; dis <= maxDis; ++dis) {
        while (!que[dis].empty()) {
          int x = que[dis].front();
          que[dis].pop();
          if (dis > g[x]) continue;
          for (int i = pre[x]; ~i; i = e[i].next) {
            int y = e[i].x, z = d[x] + e[i].w - d[y];
            if (g[x] + z < g[y]) {
              g[y] = g[x] + z;
              if (g[y] <= min(k, n - 1)) {
                maxDis = max(maxDis, g[y]);
                que[g[y]].push(y);
              }
            }
          }
        }
      }
      for (int i = 1; i <= n; ++i) {
        d[i] = min(d[0], d[i] + g[i]);
      }
    }
  }
}
