N = int(input())
X = list(map(int, input().split()))
for i in range(N):
    X[i] -= 1
diff_sum = [0 for _ in range(N)]
for i in range(N - 1):
    if X[i] != X[i + 1]:
        diff_sum[i + 1] = diff_sum[i]
    else:
        diff_sum[i + 1] = diff_sum[i] + 1

kinds = [0 for _ in range(N)]

Q = int(input())
for _ in range(Q):
    l, r, S = map(int, input().split())
    l -= 1
    r -= 1
    if r - l >= 90:
        diffs = diff_sum[r] - diff_sum[l]
        if diffs >= 60:
            print(0)
        else:
            if S >= (1 << diffs):
                print(1)
            else:
                print(0)
    else:
        vec = [0 for _ in range(r - l + 1)]
        for j in range(l, r + 1):
            vec[j - l] = X[j]
        len_vec = len(vec)

        ok = 0
        ng = len_vec + 2

        while ng - ok > 1:
            mid = (ok + ng) // 2
            prev_idx = [-1 for _ in range(len_vec + 1)]
            now_kind = 0

            left = 0
            right = 0

            while True:
                if now_kind <= mid:
                    if right == len_vec:
                        prev_idx[right] = left
                        break
                    else:
                        prev_idx[right] = left
                        if kinds[vec[right]] == 0:
                            now_kind += 1
                        kinds[vec[right]] += 1
                        right += 1
                else:
                    kinds[vec[left]] -= 1
                    if kinds[vec[left]] == 0:
                        now_kind -= 1
                    left += 1
            dp = [0 for _ in range(len_vec + 1)]
            dp_sum = [0 for _ in range(len_vec + 1)]
            dp[0] = 1
            dp_sum[0] = 1
            infin = False

            for j in range(1, len_vec + 1):
                sum_val = dp_sum[j - 1]
                if prev_idx[j] > 0:
                    sum_val -= dp_sum[prev_idx[j] - 1]
                if sum_val > S:
                    infin = True
                    break
                dp[j] = sum_val
                dp_sum[j] = dp[j] + dp_sum[j - 1]
            if infin:
                ng = mid
            else:
                ok = mid

            for j in range(len_vec):
                kinds[vec[j]] = 0

        if ok >= len_vec:
            print(-1)
        else:
            print(ok)