#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

#include<bits/stdc++.h>

using namespace std;

long long big=(1ll<<61);

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  int n;
  cin >> n;
  vector<int> a(n);
  for(auto &nx : a){cin >> nx;}

  vector<int> g(n,0);
  for(int i=1;i<n;i++){
    g[i]=g[i-1];
    if(a[i-1]==a[i]){g[i]++;}
  }

  vector<long long> dp(n+5,0);
  vector<int> mem(n+5,0);
  int clk=0;

  int q;
  cin >> q;
  while(q>0){
    q--;
    int l,r;
    long long s;
    cin >> l >> r >> s;
    l--; r--;

    int maxj=min(61,r-l);
    if((1ll<<maxj)<=s){
      cout << "-1\n"; // always <= S, so inf
      continue;
    }

    int keep=min(61,g[r]-g[l]);
    if((1ll<<keep)>s){
      cout << "0\n"; // always > S, so 0
      continue;
    }

    int ans=-1;
    for(int k=2;;k++){
      dp[l]=1;
      for(int i=l+1;i<=r+1;i++){
        dp[i]=0;
        clk++;
        int cnt=0;
        for(int j=i-1;j>=l;j--){
          if(mem[a[j]]!=clk){
            mem[a[j]]=clk;
            cnt++;
          }
          if(cnt<=k){
            dp[i]+=dp[j];
          }
          else{break;}
          if(dp[i]>s){break;}
        }
        if(dp[i]>s){
          ans=k-1;
          break;
        }
      }
      // cerr << dp[r] << "\n";
      if(ans!=-1){break;}
    }
    cout << ans << "\n";
  }
  return 0;
}