import java.io.*;
import java.util.*;

class DQuery
{
    public static void main(String[] args)
    {
        InputReader in = new InputReader(System.in);
        OutputWriter out = new OutputWriter(System.out);

        Solver solver = new Solver(in, out);
        solver.solve(1);

        out.flush();

        in.close();
        out.close();
    }

    static class Solver
    {
        int n, q, sqrtN, size;
        int[] arr, count;
        Query[] queries;
        InputReader in;
        OutputWriter out;

        public Solver(InputReader in, OutputWriter out)
        {
            this.in = in;
            this.out = out;
        }

        void solve(int testNumber)
        {
            n = in.nextInt();
            arr = new int[n + 1];
            count = new int[(int) (1e6 + 5)];

            for (int i = 1; i <= n; i++)
            {
                arr[i] = in.nextInt();

                count[arr[i]]++;

                if (count[arr[i]] == 1)
                    size++;
            }

            q = in.nextInt();
            sqrtN = (int) Math.sqrt(n);
            queries = new Query[q];

            for (int i = 0; i < q; i++)
            {
                int left, right;

                left = in.nextInt();
                right = in.nextInt();
                queries[i] = new Query(i, left, right);
            }

            Arrays.sort(queries, new Comparator<Query>()
            {
                @Override public int compare(Query o1, Query o2)
                {
                    if (o1.blockNumber == o2.blockNumber)
                        return Integer.compare(o1.right, o2.right);

                    return Integer.compare(o1.blockNumber, o2.blockNumber);
                }
            });

            int left, right;
            int[] answer;

            left = 1;
            right = n;
            answer = new int[q];

            for (int i = 0; i < q; i++)
            {
                while (left < queries[i].left)
                {
                    delete(arr[left]);
                    left++;
                }

                while (left > queries[i].left)
                {
                    left--;
                    add(arr[left]);
                }

                while (right < queries[i].right)
                {
                    right++;
                    add(arr[right]);
                }

                while (right > queries[i].right)
                {
                    delete(arr[right]);
                    right--;
                }

                answer[queries[i].queryNumber] = size;
            }

            for (int i = 0; i < q; i++)
                out.println(answer[i]);

        }

        void add(int num)
        {
            count[num]++;

            if (count[num] == 1)
                size++;
        }

        void delete(int num)
        {
            count[num]--;

            if (count[num] == 0)
                size--;
        }

        class Query
        {
            int queryNumber, left, right, blockNumber;

            public Query(int queryNumber, int left, int right)
            {
                this.queryNumber = queryNumber;
                this.left = left;
                this.right = right;
                blockNumber = left / sqrtN;
            }

        }

    }

    static class InputReader
    {
        private InputStream stream;
        private byte[] buf = new byte[1024];
        private int curChar;
        private int numChars;

        public InputReader(InputStream stream)
        {
            this.stream = stream;
        }

        public int read()
        {
            if (numChars == -1)
                throw new InputMismatchException();

            if (curChar >= numChars)
            {
                curChar = 0;
                try
                {
                    numChars = stream.read(buf);
                }
                catch (IOException e)
                {
                    throw new InputMismatchException();
                }
                if (numChars <= 0)
                    return -1;
            }

            return buf[curChar++];
        }

        public int nextInt()
        {
            int c = read();

            while (isSpaceChar(c))
                c = read();

            int sgn = 1;

            if (c == '-')
            {
                sgn = -1;
                c = read();
            }

            int res = 0;

            do
            {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();

                res *= 10;
                res += c & 15;

                c = read();
            } while (!isSpaceChar(c));

            return res * sgn;
        }

        public int[] nextIntArray(int arraySize)
        {
            int array[] = new int[arraySize];

            for (int i = 0; i < arraySize; i++)
                array[i] = nextInt();

            return array;
        }

        public long nextLong()
        {
            int c = read();

            while (isSpaceChar(c))
                c = read();

            int sign = 1;

            if (c == '-')
            {
                sign = -1;

                c = read();
            }

            long result = 0;

            do
            {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();

                result *= 10;
                result += c & 15;

                c = read();
            } while (!isSpaceChar(c));

            return result * sign;
        }

        public long[] nextLongArray(int arraySize)
        {
            long array[] = new long[arraySize];

            for (int i = 0; i < arraySize; i++)
                array[i] = nextLong();

            return array;
        }

        public float nextFloat() // problematic
        {
            float result, div;
            byte c;

            result = 0;
            div = 1;
            c = (byte) read();

            while (c <= ' ')
                c = (byte) read();

            boolean isNegative = (c == '-');

            if (isNegative)
                c = (byte) read();

            do
            {
                result = result * 10 + c - '0';
            } while ((c = (byte) read()) >= '0' && c <= '9');

            if (c == '.')
                while ((c = (byte) read()) >= '0' && c <= '9')
                    result += (c - '0') / (div *= 10);

            if (isNegative)
                return -result;

            return result;
        }

        public double nextDouble() // not completely accurate
        {
            double ret = 0, div = 1;
            byte c = (byte) read();

            while (c <= ' ')
                c = (byte) read();

            boolean neg = (c == '-');

            if (neg)
                c = (byte) read();

            do
            {
                ret = ret * 10 + c - '0';
            } while ((c = (byte) read()) >= '0' && c <= '9');

            if (c == '.')
                while ((c = (byte) read()) >= '0' && c <= '9')
                    ret += (c - '0') / (div *= 10);

            if (neg)
                return -ret;

            return ret;
        }

        public String next()
        {
            int c = read();

            while (isSpaceChar(c))
                c = read();

            StringBuilder res = new StringBuilder();

            do
            {
                res.appendCodePoint(c);

                c = read();
            } while (!isSpaceChar(c));

            return res.toString();
        }

        public boolean isSpaceChar(int c)
        {
            return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
        }

        public String nextLine()
        {
            int c = read();

            StringBuilder result = new StringBuilder();

            do
            {
                result.appendCodePoint(c);

                c = read();
            } while (!isNewLine(c));

            return result.toString();
        }

        public boolean isNewLine(int c)
        {
            return c == '\n';
        }

        public void close()
        {
            try
            {
                stream.close();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }

    }

    static class OutputWriter
    {
        private PrintWriter writer;

        public OutputWriter(OutputStream stream)
        {
            writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(
                    stream)));
        }

        public OutputWriter(Writer writer)
        {
            this.writer = new PrintWriter(writer);
        }

        public void println(int x)
        {
            writer.println(x);
        }

        public void print(int x)
        {
            writer.print(x);
        }

        public void println(int array[], int size)
        {
            for (int i = 0; i < size; i++)
                println(array[i]);
        }

        public void print(int array[], int size)
        {
            for (int i = 0; i < size; i++)
                print(array[i] + " ");
        }

        public void println(long x)
        {
            writer.println(x);
        }

        public void print(long x)
        {
            writer.print(x);
        }

        public void println(long array[], int size)
        {
            for (int i = 0; i < size; i++)
                println(array[i]);
        }

        public void print(long array[], int size)
        {
            for (int i = 0; i < size; i++)
                print(array[i]);
        }

        public void println(float num)
        {
            writer.println(num);
        }

        public void print(float num)
        {
            writer.print(num);
        }

        public void println(double num)
        {
            writer.println(num);
        }

        public void print(double num)
        {
            writer.print(num);
        }

        public void println(String s)
        {
            writer.println(s);
        }

        public void print(String s)
        {
            writer.print(s);
        }

        public void println()
        {
            writer.println();
        }

        public void printSpace()
        {
            writer.print(" ");
        }

        public void flush()
        {
            writer.flush();
        }

        public void close()
        {
            writer.close();
        }

    }

    static class CMath
    {
        static long power(long number, long power)
        {
            if (number == 1 || number == 0 || power == 0)
                return 1;

            if (power == 1)
                return number;

            if (power % 2 == 0)
                return power(number * number, power / 2);
            else
                return power(number * number, power / 2) * number;
        }

        static long modPower(long number, long power, long mod)
        {
            if (number == 1 || number == 0 || power == 0)
                return 1;

            number = mod(number, mod);

            if (power == 1)
                return number;

            long square = mod(number * number, mod);

            if (power % 2 == 0)
                return modPower(square, power / 2, mod);
            else
                return mod(modPower(square, power / 2, mod) * number, mod);
        }

        static long moduloInverse(long number, long mod)
        {
            return modPower(number, mod - 2, mod);
        }

        static long mod(long number, long mod)
        {
            return number - (number / mod) * mod;
        }

    }

}