#include <cassert>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <functional>
#include <iostream>
#include <limits>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

using namespace std;

using Int = long long;

template <class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &a) { return os << "(" << a.first << ", " << a.second << ")"; };
template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; }
template <class T> void pv(T a, T b) { for (T i = a; i != b; ++i) cerr << *i << " "; cerr << endl; }
template <class T> bool chmin(T &t, const T &f) { if (t > f) { t = f; return true; } return false; }
template <class T> bool chmax(T &t, const T &f) { if (t < f) { t = f; return true; } return false; }
#define COLOR(s) ("\x1b[" s "m")


// get i
// add val to [a, b)
// count < val in [a, b)
// O(sqrt(n) log(n)) per query
template <class T> struct RangeAddRangeCount {
  int n, l, m;
  vector<T> ts, offset, sorted;
  RangeAddRangeCount() {}
  RangeAddRangeCount(const vector<T> &ts_) : ts(ts_) {
    n = ts.size();
    m = max<int>(sqrt(n), 1);
    l = n / m;
    offset.assign(l + 1, 0);
    sorted.resize(l * m);
    for (int x = 0; x < l; ++x) build(x);
  }
  void build(int x) {
    assert(0 <= x); assert(x < l);
    std::copy(ts.begin() + (x * m), ts.begin() + ((x + 1) * m), sorted.begin() + (x * m));
    std::sort(sorted.begin() + (x * m), sorted.begin() + ((x + 1) * m));
  }
  T operator[](int i) const {
    assert(0 <= i); assert(i < n);
    return offset[i / m] + ts[i];
  }
  void add(int a, int b, T val) {
    assert(0 <= a); assert(a <= b); assert(b <= n);
    const int xA = (a + m - 1) / m;
    const int xB = b / m;
    if (xA <= xB) {
      for (int i = xA * m; --i >= a; ) ts[i] += val;
      if (xA > 0) build(xA - 1);
      for (int x = xA; x < xB; ++x) offset[x] += val;
      for (int i = xB * m; i < b; ++i) ts[i] += val;
      if (xB < l) build(xB);
    } else {
      for (int i = a; i < b; ++i) ts[i] += val;
      if (xB < l) build(xB);
    }
  }
  int count(int a, int b, T val) const {
    assert(0 <= a); assert(a <= b); assert(b <= n);
    const int xA = (a + m - 1) / m;
    const int xB = b / m;
    int cnt = 0;
    if (xA <= xB) {
      for (int i = xA * m; --i >= a; ) if (offset[xA - 1] + ts[i] < val) ++cnt;
      for (int x = xA; x < xB; ++x) {
        cnt += (lower_bound(sorted.begin() + (x * m), sorted.begin() + ((x + 1) * m), val - offset[x]) - (sorted.begin() + (x * m)));
      }
      for (int i = xB * m; i < b; ++i) if (offset[xB] + ts[i] < val) ++cnt;
    } else {
      for (int i = a; i < b; ++i) if (offset[xB] + ts[i] < val) ++cnt;
    }
    return cnt;
  }
};

////////////////////////////////////////////////////////////////////////////////


int N;
vector<int> A, B;
vector<Int> C;

vector<vector<int>> G;
vector<int> sz, del;
void dfsSz(int u, int p) {
  sz[u] = 1;
  for (const int i : G[u]) {
    const int v = A[i] ^ B[i] ^ u;
    if (p != v) {
      dfsSz(v, u);
      sz[u] += sz[v];
    }
  }
}
string dfsString(int u, int p) {
  ostringstream oss;
  oss << "[" << u;
  for (const int i : G[u]) {
    const int v = A[i] ^ B[i] ^ u;
    if (!del[v] && p != v) {
      oss << " " << dfsString(v, u);
    }
  }
  oss << "]";
  return oss.str();
}
/// vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
// initial
vector<vector<Int>> css;
// [r][j] -> [*, *)
vector<vector<pair<int, int>>> pss;
// vertex -> ((r, (j, dis)))
vector<vector<pair<int, pair<int, int>>>> V;
// edge -> ((r, [*, *)))
vector<vector<pair<int, pair<int, int>>>> E;

int zeit;
void dfs(int r, int j, int u, int p, Int c) {
  css[r].push_back(c);
  V[u].emplace_back(r, make_pair(j, zeit));
  ++zeit;
  for (const int i : G[u]) {
    const int v = A[i] ^ B[i] ^ u;
    if (!del[v] && p != v) {
      const int lb = zeit;
      dfs(r, j, v, u, c + C[i]);
      const int ub = zeit;
      E[i].emplace_back(r, make_pair(lb, ub));
    }
  }
}
/// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
void solveSubtree(int depth, int r) {
#ifdef LOCAL
  cerr << string(2 * depth, ' ') << "solveSubtree " << dfsString(r, -1) << endl;
#endif
  vector<int> is, vs;
  for (const int i : G[r]) {
    const int v = A[i] ^ B[i] ^ r;
    if (!del[v]) {
      is.push_back(i);
      vs.push_back(v);
    }
  }
  const int len = vs.size();
  /// vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
  css[r].push_back(0);
  pss[r].resize(len);
  zeit = 0;
  V[r].emplace_back(r, make_pair(-1, zeit));
  ++zeit;
  for (int j = 0; j < len; ++j) {
    const int i = is[j], v = vs[j];
    const int lb = zeit;
    dfs(r, j, v, r, C[i]);
    const int ub = zeit;
    pss[r][j] = make_pair(lb, ub);
    E[i].emplace_back(r, make_pair(lb, ub));
  }
  /// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
}
void solveRec(int depth, int u) {
  for (; ; ) {
    int vm = -1;
    for (const int i : G[u]) {
      const int v = A[i] ^ B[i] ^ u;
      if (!del[v]) {
        if (!~vm || sz[vm] < sz[v]) {
          vm = v;
        }
      }
    }
    if (!~vm || 2 * sz[vm] <= sz[u]) {
      solveSubtree(depth, u);
      del[u] = 1;
      for (const int i : G[u]) {
        const int v = A[i] ^ B[i] ^ u;
        if (!del[v]) {
          solveRec(depth + 1, v);
        }
      }
      break;
    } else {
      sz[u] -= sz[vm];
      sz[vm] += sz[u];
      u = vm;
    }
  }
}
void centroidDecomp() {
  sz.assign(N, 0);
  dfsSz(0, -1);
  del.assign(N, 0);
  
  css.assign(N, {});
  pss.assign(N, {});
  V.assign(N, {});
  E.assign(N - 1, {});
  
  solveRec(0, 0);
}


int main() {
  int Q;
  for (; ~scanf("%d%d", &N, &Q); ) {
    A.resize(N - 1);
    B.resize(N - 1);
    C.resize(N - 1);
    for (int i = 0; i < N - 1; ++i) {
      scanf("%d%d%lld", &A[i], &B[i], &C[i]);
      --A[i];
      --B[i];
    }
    
    G.assign(N, {});
    for (int i = 0; i < N - 1; ++i) {
      G[A[i]].push_back(i);
      G[B[i]].push_back(i);
    }
    centroidDecomp();
/*
cerr<<"css = "<<css<<endl;
cerr<<"pss = "<<pss<<endl;
cerr<<"V = "<<V<<endl;
cerr<<"E = "<<E<<endl;
*/
    
    vector<RangeAddRangeCount<Int>> fs(N);
    for (int u = 0; u < N; ++u) {
      fs[u] = RangeAddRangeCount<Int>(css[u]);
    }
    
    for (; Q--; ) {
      int O;
      scanf("%d", &O);
      if (O == 1) {
        int I;
        Int CC;
        scanf("%d%lld", &I, &CC);
        --I;
// cerr<<COLOR("33")<<"change "<<I<<" "<<C<<COLOR()<<endl;
        const Int dC = CC - C[I];
        C[I] = CC;
        for (const auto &e : E[I]) {
          fs[e.first].add(e.second.first, e.second.second, dC);
        }
      } else {
        int U;
        Int D;
        scanf("%d%lld", &U, &D);
        --U;
// cerr<<COLOR("93")<<"count "<<U<<" "<<D<<COLOR()<<endl;
        int ans = 0;
        for (const auto &e : V[U]) {
          const int r = e.first;
          const int j = e.second.first;
          const int pos = e.second.second;
          const Int c = fs[r][pos];
          if (D >= c) {
            int here = 0;
            here += fs[r].count(0, fs[r].n, D - c + 1);
            if (~j) here -= fs[r].count(pss[r][j].first, pss[r][j].second, D - c + 1);
            ans += here;
          }
        }
        printf("%d\n", ans);
#ifdef LOCAL
constexpr Int INF=1001001001001001001LL;
vector<vector<Int>>d(N,vector<Int>(N,INF));
for(int u=0;u<N;++u)d[u][u]=0;
for(int i=0;i<N-1;++i)d[A[i]][B[i]]=d[B[i]][A[i]]=C[i];
for(int w=0;w<N;++w)for(int u=0;u<N;++u)for(int v=0;v<N;++v)chmin(d[u][v],d[u][w]+d[w][v]);
int brt=0;
for(int u=0;u<N;++u)if(d[U][u]<=D)++brt;
if(brt!=ans){
 cerr<<"N = "<<N<<endl;
 cerr<<"A = "<<A<<endl;
 cerr<<"B = "<<B<<endl;
 cerr<<"C = "<<C<<endl;
 cerr<<"d["<<U<<"] = "<<d[U]<<endl;
 cerr<<"brt = "<<brt<<endl;
 cerr<<"ans = "<<ans<<endl;
}
assert(brt==ans);
#endif
      }
    }
  }
  return 0;
}