#include <bits/stdc++.h>
// #include <windows.h>
// #include <bits/extc++.h>
// using namespace __gnu_pbds;
using namespace std;
//#pragma GCC optimize(3)
#define DB double
#define LL long long
#define ULL unsigned long long
#define in128 __int128
#define cint const int
#define cLL const LL
#define For(z,e1,e2) for(int z=(e1);z<=(e2);z++)
#define Rof(z,e1,e2) for(int z=(e2);z>=(e1);z--)
#define For_(z,e1,e2) for(int z=(e1);z<(e2);z++)
#define Rof_(z,e1,e2) for(int z=(e2);z>(e1);z--)
#define inint(e) scanf("%d",&e)
#define inll(e) scanf("%lld",&e)
#define inpr(e1,e2) scanf("%d%d",&e1,&e2)
#define in3(e1,e2,e3) scanf("%d%d%d",&e1,&e2,&e3)
#define outint(e) printf("%d\n",e)
#define outint_(e) printf("%d%c",e," \n"[i==n])
#define outint2_(e,e1,e2) printf("%d%c",e," \n"[(e1)==(e2)])
#define outll(e) printf("%lld\n",e)
#define outll_(e) printf("%lld%c",e," \n"[i==n])
#define outll2_(e,e1,e2) printf("%lld%c",e," \n"[(e1)==(e2)])
#define exc(e) if(e) continue
#define stop(e) if(e) break
#define ret(e) if(e) return
#define ll(e) (1ll*(e))
#define pb push_back
#define ft first
#define sc second
#define pii pair<int,int> 
#define pli pair<long long,int> 
#define vct vector 
#define clean(e) while(!e.empty()) e.pop()
#define all(ev) ev.begin(),ev.end()
#define sz(ev) ((int)ev.size())
#define debug(x) printf("%s=%d\n",#x,x)
#define x0 __xx00__
#define y1 __yy11__
#define ffo fflush(stdout)
cLL mod=998244353,G=404;
// cLL mod[2]={1686688681ll,1666888681ll},base[2]={166686661ll,188868881ll};
template <typename Type> void get_min(Type &w1,const Type w2) { if(w2<w1) w1=w2; } template <typename Type> void get_max(Type &w1,const Type w2) { if(w2>w1) w1=w2; }
template <typename Type> Type up_div(Type w1,Type w2) { return (w1/w2+(w1%w2?1:0)); }
template <typename Type> Type gcd(Type X_,Type Y_) { Type R_=X_%Y_; while(R_) { X_=Y_; Y_=R_; R_=X_%Y_; } return Y_; } template <typename Type> Type lcm(Type X_,Type Y_) { return (X_/gcd(X_,Y_)*Y_); }
template <typename Type> Type md(Type w1,const Type w2=mod) { w1%=w2; if(w1<0) w1+=w2; return w1; } template <typename Type> Type md_(Type w1,const Type w2=mod) { w1%=w2; if(w1<=0) w1+=w2; return w1; }
void ex_gcd(LL &X_,LL &Y_,LL A_,LL B_) { if(!B_) { X_=1ll; Y_=0ll; return ; } ex_gcd(Y_,X_,B_,A_%B_); X_=md(X_,B_); Y_=(1ll-X_*A_)/B_; } LL inv(LL A_,LL B_=mod) { LL X_=0ll,Y_=0ll; ex_gcd(X_,Y_,A_,B_); return X_; }
template <typename Type> void add(Type &w1,const Type w2,const Type M_=mod) { w1=md(w1+w2,M_); } void mul(LL &w1,cLL w2,cLL M_=mod) { w1=md(w1*md(w2,M_),M_); } template <typename Type> Type pw(Type X_,Type Y_,Type M_=mod) { Type S_=1; while(Y_) { if(Y_&1) mul(S_,X_,M_); Y_>>=1; mul(X_,X_,M_); } return S_; }
template <typename Type> Type bk(vector <Type> &V_) { auto T_=V_.back(); V_.pop_back(); return T_; } template <typename Type> Type tp(stack <Type> &V_) { auto T_=V_.top(); V_.pop(); return T_; } template <typename Type> Type frt(queue <Type> &V_) { auto T_=V_.front(); V_.pop(); return T_; }
template <typename Type> Type bg(set <Type> &V_) { auto T_=*V_.begin(); V_.erase(V_.begin()); return T_; } template <typename Type> Type bk(set <Type> &V_) { auto T_=*prev(V_.end()); V_.erase(*prev(V_.end())); return T_; }
mt19937 gen(time(NULL)); int rd() { return abs((int)gen()); }
int rnd(int l,int r) { return rd()%(r-l+1)+l; }

void main_init()
{

}
cint N=1.02e5,Q_=1.02e6;
int n,Q;
vct <int> v[N];
int fa[N];
vct <array<int,3> > q[N];
int mxdep[N],to[N];
vct <array<int,2> > will_mer[N];
void dfs(int p,int dep)
{
    will_mer[dep].pb({0,p});
    ret(v[p].empty());
    int k=v[p][0];
    for(auto i:v[p])
    {
        dfs(i,dep+1);
        get_max(mxdep[p],mxdep[i]+1);
        if(mxdep[i]>mxdep[k]) k=i;
    }
    to[p]=k;
    vct <int> h=v[p];
    int tot=0;
    while(!h.empty())
    {
        tot++;
        int len=sz(h);
        For_(i,0,len-1) will_mer[tot].pb({h[i],h[i+1]});
        vct <int> h2;
        for(auto i:h) if(to[i]) h2.pb(to[i]);
        h=move(h2);
    }
}
int uf[N];
set <int> st[N];
int fin(int w)
{
    return ((w==uf[w])?w:(uf[w]=fin(uf[w])));
}
vct <array<int,2> > c1,c2;
void ins(int l,int r)
{
    l++,r--; ret(l>r);
    c1.pb({l,r});
}
void ers(int l,int r)
{
    l++,r--; ret(l>r);
    c2.pb({l,r});
}
void clr(int w)
{
    st[w].erase(st[w].begin());
    int lst=0;
    for(auto iter:st[w])
    {
        ers(lst,iter);
        lst=iter;
    }
}
bool mer(int w1,int w2)
{
    w1=fin(w1),w2=fin(w2);
    // printf("merge %d %d\n",w1,w2);
    if(w1==w2) return false;
    if((!w1)||(!w2))
    {
        w1|=w2;
        uf[w1]=0;
        clr(w1);
        return true;
    }
    if(sz(st[w1])<sz(st[w2])) swap(w1,w2);
    clr(w2);
    st[w2].erase(prev(st[w2].end()));
    for(auto x:st[w2])
    {
        auto iter=st[w1].insert(x).ft;
        int l=*prev(iter),r=*next(iter);
        ers(l,r),ins(l,x),ins(x,r);
    }
    uf[w2]=w1;
    return true;
}
int ans[Q_];
void main_solve()
{
    inpr(n,Q);
    For(i,1,n) inint(fa[i]),v[fa[i]].pb(i);
    For(id,1,Q)
    {
        int l,r,x; in3(l,r,x);
        q[x].pb({l,r,id});
    }
    dfs(0,0);
    For(i,1,n)
    {
        uf[i]=i;
        st[i].insert(0); st[i].insert(i); st[i].insert(n+1);
        ins(0,i),ins(i,n+1);
    }
    int now=n;
    For(i,1,n)
    {
        // printf("i=%d\n",i);
        for(auto [x,y]:will_mer[i])
            now-=mer(x,y);
        // printf("> now=%d\n",now);
        for(auto [l,r,id]:q[i])
        {
            int cnt=now;
            for(auto [l2,r2]:c1) if(l2<=l&&r<=r2)
                cnt--;
            for(auto [l2,r2]:c2) if(l2<=l&&r<=r2)
                cnt++;
            ans[id]=cnt;
        }
    }
    For(i,1,Q) outint(ans[i]);
}
int main()
{
    // ios::sync_with_stdio(0); cin.tie(0);
    // freopen("ex_block4.in","r",stdin);
    // freopen("out.txt","w",stdout);
    // srand(time(NULL));
    main_init();
    // int _; inint(_); For(__,1,_) // T>1 ?
        // printf("\n------------\n\n"),
        main_solve();
    // cerr<<clock()<<'\n';
    return 0;
}
/*

*/