#include <bits/stdc++.h>
using namespace std;
const int maxn = 2e5 + 10;
int next_idx[maxn];

vector<int> segment_tree[3 * maxn];
vector<int> merge_two_nodes(vector<int> & a, vector<int> & b) {
    int i = 0, j = 0;
    vector<int> c;
    while(i < (int) a.size() and j < (int) b.size()) {
        if(a[i] <= b[j]) {
            c.push_back(a[i]);
            i++;
        }
        else {
            c.push_back(b[j]);
            j++;
        }
    }
    while(i < (int) a.size()) {
        c.push_back(a[i]);
        i++;
    }
    while(j < (int) b.size()) {
        c.push_back(b[j]);
        j++;
    }
    return c;
}
void build_tree(int L, int R, int node) {
    if(L == R) {
        segment_tree[node].push_back(next_idx[L]);
    }
    else {
        int middle = (L + R) / 2;
        build_tree(L, middle, 2 * node);
        build_tree(middle + 1, R, 2 * node + 1);
        segment_tree[node] = merge_two_nodes(segment_tree[2 * node], segment_tree[2 * node + 1]);
    }
}
// L R i L R j L R 
int query(int L, int R, int node, int i, int j) {
    if(R < i or j < L) {
        return 0;
    }
    if(i <= L and R <= j) {
        return (int) segment_tree[node].size() - (lower_bound(segment_tree[node].begin(), segment_tree[node].end(), j + 1) - segment_tree[node].begin());
    }
    int middle = (L + R) / 2;
    return query(L, middle, 2 * node, i, j) + query(middle + 1, R, 2 * node + 1, i, j);
}
int main() {
    ios_base::sync_with_stdio(false);
    int n, q;
    cin >> n >> q;
    for(int i = 0; i < n; i++) {
        next_idx[i] = n;
    }
    vector<pair<int, int>> v(n);
    for(int i = 0; i < n; i++) {
        cin >> v[i].first;
        v[i].second = i;
    }
    sort(v.begin(), v.end());

    for(int i = 0; i < n - 1; i++) {
        if(v[i].first == v[i + 1].first) {
            next_idx[v[i].second] = v[i + 1].second;
        }
    }
    build_tree(0, n - 1, 1);
    
    
    for(int i = 0; i < q; i++) {
        int a, b;
        cin >> a >> b;
        a--; b--;

        cout << query(0, n - 1, 1, a, b) << endl;
    }

    
    return 0;
}