#include <bits/stdc++.h>
using namespace std;
using ll=long long;
using pll=pair<ll,ll>;
using tll=tuple<ll,ll,ll>;
using ld=long double;
const ll INF=(1ll<<60);
#define rep(i,n) for (ll i=0;i<(ll)(n);i++)
#define all(v) v.begin(),v.end()
template<class T> inline bool chmin(T &a,T b){
    if(a>b){
        a=b;
        return true;
    }
    return false;
}
template<class T> inline bool chmax(T &a,T b){
    if(a<b){
        a=b;
        return true;
    }
    return false;
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    vector<ll> cnt(1000001,0);
    ll n;
    cin >> n;
    vector<ll> x(n);
    rep(i,n) cin >> x[i];
    ll q;
    cin >> q;
    while(q--){
        ll l,r,s;
        cin >> l >> r >> s;
        l--;
        ll w=r-l,ok=0;
        if((1ll<<min(61ll,w-1))<=s){
            cout << "-1\n";
            continue;
        }
        for(ll k=1;k<=w;k++){
            vector<ll> vr(w,0);
            ll nr=0,sz=0;
            rep(nl,w){
                auto g=[&](ll idx){
                    ll p=0;
                    if(cnt[x[l+idx]]==0) p=1;
                    return (sz+p)<=k;
                };
                while(nr<w&&g(nr)){
                    if(cnt[x[l+nr]]==0) sz++;
                    cnt[x[l+nr]]++;
                    nr++;
                }
                vr[nl]=nr;
                cnt[x[l+nl]]--;
                if(cnt[x[l+nl]]==0) sz--;
            }
            vector<__int128> dp(w+1,0),sum(w+2,0);
            dp[0]=1;
            rep(i,w+1){
                dp[i]+=sum[i];
                if(s<dp[i]){
                    dp[w]=s+1;
                    break;
                }
                if(i==w) break;
                sum[i+1]+=dp[i];
                sum[1+vr[i]]-=dp[i];
                sum[i+1]+=sum[i];
            }
            if(dp[w]<=s) chmax(ok,k);
            else break;
        }
        cout << ok << '\n';
    }
}