#include <bits/stdc++.h>

using namespace std;

ifstream fin("rangemode.in");
ofstream fout("rangemode.out");

const int NMAX = 1e5 + 1;

class qry {
    public:
        int x, y, index, block_index;

        bool operator < (const qry &A) const {
            if(block_index != A.block_index)
                return make_pair(x, y) < make_pair(A.x, A.y);
            return (block_index & 1) ? (y < A.y) : (y > A.y);
        }
} q[NMAX];

int a[NMAX], sol[NMAX], max_val, freq[NMAX];

int main() {
    int N, Q;
    fin >> N >> Q;
    for(int i = 1; i <= N; ++i)
        fin >> a[i];
    const int block = sqrt(N);
    for(int i = 0; i < Q; ++i) {
        fin >> q[i].x >> q[i].y;
        q[i].index = i;
        q[i].block_index = q[i].x / block;
    }
    sort(q, q + Q);
    int st = q[0].x, dr = q[0].y;
    for(int i = st; i <= dr; ++i)
        update(a[i], 1);
    sol[q[0].index] = ;
    for(int i = 1; i < Q; ++i) {
        while(st > q[i].x)
            update(a[--st], 1);
        while(dr < q[i].y)
            update(a[++dr], 1);
        while(st < q[i].x)
            update(a[st++], -1);
        while(dr > q[i].y)
            update(a[dr--], -1);
        sol[q[i].index] = ;
    }
    for(int i = 0; i < Q; ++i)
        fout << sol[i] << '\n';
}