#include "bits/stdc++.h"
typedef long long ll;
typedef unsigned un;
using namespace std;
typedef std::pair<ll,ll> pll;
const int MAXN = 200011,INF = 1e9+233;

pll merge(pll a,pll b){return pll(max(a.first,b.first),min(a.second,b.second));}
int n,q;
struct Segment_Tree
{
    struct node
    {
        ll maxv,minv;
    }t[MAXN<<2|1];
    #define rt t[num]
    void pushup(un num)
    {
        rt.maxv=max(t[num<<1].maxv,t[num<<1|1].maxv);
        rt.minv=min(t[num<<1].minv,t[num<<1|1].minv);
    }
    void build(ll* arr,un l=1,un r=n,un num=1)
    {
        if(l==r)
        {
            if(arr[l]==-1)rt.maxv=0,rt.minv=INF;
            else rt.maxv=rt.minv=arr[l];
            return;
        }
        un mid=(l+r)>>1;
        build(arr,l,mid,num<<1),build(arr,mid+1,r,num<<1|1);
        pushup(num);
    }
    void modify(un pos,ll val,un l=1,un r=n,un num=1)
    {
        if(l==r)
        {
            if(val==-1)rt.maxv=0,rt.minv=INF;
            else rt.maxv=rt.minv=val;
            return;
        }
        un mid=(l+r)>>1;
        if(pos<=mid)modify(pos,val,l,mid,num<<1);
        else modify(pos,val,mid+1,r,num<<1|1);
        pushup(num);
    }
    pll Query(un ql,un qr,un l=1,un r=n,un num=1)
    {
        if(ql<=l&&r<=qr)return pll(rt.maxv,rt.minv);
        pll res(0,INF);
        un mid=(l+r)>>1;
        if(ql<=mid)res=merge(res,Query(ql,qr,l,mid,num<<1));
        if(qr>mid)res=merge(res,Query(ql,qr,mid+1,r,num<<1|1));
        return res;
    }
}sgt[51];
std::vector<pll>g[MAXN],ctrb[MAXN];
int fa[MAXN],top[MAXN],loc[MAXN];
ll dis[MAXN];
int cur=0;
string s;
void push(int u,int sp,int c,ll d)
{
    if(s[u]=='1')sgt[c].modify(u,d);
    ctrb[u].push_back(pll(c,d));
    //printf("sgt[%d] modify %d %lld\n",c,u,d);
    for(auto P:g[u])
    {
        int v=P.first;
        if(v!=sp&&v!=fa[u])push(v,sp,c,d);
    }
}
void dfs(int u,int t,bool type)
{
    if(type)++cur,t=u;
    top[u]=t,loc[u]=cur;
    //printf("loc[%d]=%d\n",u,cur);
    int p=u;
    while(p)
    {
        ctrb[u].emplace_back(pll(loc[p],dis[p]));
        //printf("sgt[%d] modify %d %lld\n",loc[p],u,dis[p]);
        if(s[u]=='1')sgt[loc[p]].modify(u,dis[p]);
        p=fa[top[p]];
    }
    bool flag=0;
    for(auto P:g[u])
    {
        int v=P.first;
        ll w=P.second;
        if(v==fa[u])continue;
        fa[v]=u,dis[v]=dis[u]+w;
        dfs(v,t,flag);
        if(flag)push(u,v,cur,dis[u]);
        flag=1;
    }
}

int main()
{
    //freopen("K.in","r",stdin);
    cin.tie(0)->sync_with_stdio(0);
    cin>>n>>q>>s;
    s.insert(s.begin(),0);
    for(int i=1;i<n;++i)
    {
        int u,v,w;
        cin>>u>>v>>w;
        g[u].emplace_back(pll(v,w));
        g[v].emplace_back(pll(u,w));
    }
    for(int i=1;i<=n;++i)val[0][i]=-1;
    for(int k=1;k<=50;++k)sgt[k].build(val[0]);
    dfs(1,1,1);
    while(q--)
    {
        int op;
        cin>>op;
        if(op==1)
        {
            int x;
            cin>>x;
            if(s[x]=='1')
            {
                for(auto P:ctrb[x])
                    sgt[P.first].modify(x,-1);
                s[x]='0';
            }
            else
            {
                for(auto P:ctrb[x])
                    sgt[P.first].modify(x,P.second);
                s[x]='1';
            }
        }
        else
        {
            int l,r;
            cin>>l>>r;
            ll ans=0;
            for(int k=1;k<=cur;++k)
            {
                pll f=sgt[k].Query(l,r);
                ans+=f.first-f.second;
            }
            if(ans<0)cout<<"-1\n";
            else cout<<(ans<<1)<<'\n';
        }
    }
    return 0;
}

answer.code: In function ‘int main()’:
answer.code:112:26: error: ‘val’ was not declared in this scope
  112 |     for(int i=1;i<=n;++i)val[0][i]=-1;
      |                          ^~~
answer.code:113:40: error: ‘val’ was not declared in this scope
  113 |     for(int k=1;k<=50;++k)sgt[k].build(val[0]);
      |                                        ^~~