#include<bits/stdc++.h>
#define ll long long
#define ntr "\n"
#define mod (ll)(1e9+7)
#define taskname ""
#define frep freopen(taskname".inp","r",stdin); freopen(taskname".out","w",stdout);
using namespace std;
vector<ll> euler(200009),pos(200009),sz(200009),sum(200009),fenwick(200009),depth(200009);
ll up[200009][20];
vector<pair<ll,ll>> adj[200009];
ll n,q,p=1;
struct edge{
    ll a,b,w;
};
vector<edge> edges;
void dfs(ll u,ll par,ll w){
    euler[p]=u;
    depth[u]=depth[par]+1;
    pos[u]=p;
    sz[u]=1;
    p++;
    up[u][0]=par;
    for(int i=1;i<20;i++){
        up[u][i]=up[up[u][i-1]][i-1];
    }
    sum[pos[u]]=sum[pos[par]]+w;
    for(auto [v,wi]:adj[u]){
        if(v!=par){
            dfs(v,u,wi);
            sz[u]+=sz[v];
        }
    }
}
ll lca(ll u,ll v){
    if(depth[u]<depth[v]) swap(u,v);
    ll k=depth[u]-depth[v];
    for(int i=19;i>=0;i--){
        if(k&(1<<i)){
            u=up[u][i];
        }
    }
    if(u==v){
        return u;
    }
    for(int i=19;i>=0;i--){
        if(up[u][i]!=up[v][i]){
            u=up[u][i];
            v=up[v][i];
        }
    }
    return up[u][0];
}
void update(ll u,ll val){
    for(;u<=n;u+=u&(-u)){
        fenwick[u]+=val;
    }
}
ll get(ll u){
    ll s=0;
    for(;u>0;u-=u&(-u)){
        s+=fenwick[u];
    }
    return s;
}
int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    //frep;
    cin>>n;
    for(int i=0;i<n-1;i++){
        ll a,b,w;
        cin>>a>>b>>w;
        edges.push_back({a,b,w});
        adj[a].push_back({b,w});
        adj[b].push_back({a,w});
    }
    dfs(1,0,0);
    cin>>q;
    while(q--){
        ll k,i,j;
        cin>>k>>i>>j;
        if(k==2){
            ll k=lca(i,j);
            cout<<sum[pos[i]]+get(pos[i])+sum[pos[j]]+get(pos[j])-2*(sum[pos[k]]+get(pos[k]))<<ntr;
        }
        else{
            ll delta=j-edges[i-1].w;
            ll a;
            if(depth[edges[i-1].a]>depth[edges[i-1].b])
                a=edges[i-1].a;
            else
                a=edges[i-1].b;
            update(pos[a],delta);
            update(pos[a]+sz[a],-delta);
            edges[i-1].w=j;
        }
    }
}