use core::cmp::{max, min};
use proconio::input;
use std::collections::BTreeSet;

const INF: i128 = 1_000_000_000_000_000_000 + 1000;

fn main() {
    input! {
        n: i32,
        x: [i32; n],
        q: i32,
        ques: [(i32, i32, i64); q],
    }

    let mut count_same = vec![0; n as usize];
    for i in 0..(n - 1) {
        count_same[(i + 1) as usize] = count_same[i as usize]
            + if x[i as usize] == x[(i + 1) as usize] {
                1
            } else {
                0
            }
    }

    const MAX_K: i32 = 70;
    let mut range = vec![vec![n; (MAX_K + 1) as usize]; n as usize];
    for i in 0..n {
        let mut set = BTreeSet::new();
        for j in (max(0, i - MAX_K + 1)..i + 1).rev() {
            set.insert(x[j as usize]);
            range[i as usize][set.len()] = j;
        }
        for k in (set.len() as i32)..MAX_K + 1 {
            range[i as usize][k as usize] = 0;
        }
    }

    for (l, r, s) in ques {
        let l = l - 1;

        let dist = r - l;

        if dist <= 62 && 1i64 << (dist - 1) <= s {
            println!("-1");
            continue;
        }

        let same = count_same[(r - 1) as usize] - count_same[l as usize];

        if 61 <= same || s < (1i64 << same) {
            println!("0");
            continue;
        }

        for k in 2..MAX_K {
            let mut dp = vec![0i128; (dist + 1) as usize];
            let mut dp_sum = vec![0i128; (dist + 1 + 1) as usize];
            dp[0] = 1;
            dp_sum[1] = 1;
            for i in l..r {
                dp[(i + 1 - l) as usize] = min(
                    INF,
                    dp_sum[(i + 1 - l) as usize]
                        - dp_sum[(max(l, range[i as usize][k as usize]) - l) as usize],
                );
                dp_sum[(i + 1 - l + 1) as usize] =
                    dp_sum[(i + 1 - l) as usize] + dp[(i + 1 - l) as usize];
            }
            if dp[(r - l) as usize] > s as i128 {
                println!("{}", k - 1);
                break;
            }
        }
    }
}