#include <bits/stdc++.h>
#define SZ(x) ((int) (x).size())
using namespace std;
typedef long long i64;
int main() {
#ifdef LOCAL_RUN
freopen("task.in", "r", stdin);
freopen("task.out", "w", stdout);
//freopen("task.err", "w", stderr);
#endif // ONLINE_JUDGE
ios::sync_with_stdio(false);
cin.tie(0);
int n, k, q;
cin >> n >> k >> q;
vector<int> A(n);
vector<int> stk;
vector<vector<int>> graph(n);
for (int i = 0; i < n; ++i) {
cin >> A[i];
int prev = -1;
while (!stk.empty() && A[i] > A[stk.back()]) {
if (A[stk.back()] > prev) {
graph[i].push_back(stk.back());
graph[stk.back()].push_back(i);
}
prev = A[stk.back()];
stk.pop_back();
}
if (!stk.empty()) {
graph[i].push_back(stk.back());
graph[stk.back()].push_back(i);
}
stk.push_back(i);
}
while (q-- > 0) {
int s, d;
cin >> s >> d;
s--; d--;
vector<int> dist(n, -1);
dist[s] = 0;
queue<int> q;
q.push(s);
while (!q.empty() && dist[d] == -1) {
int node = q.front();
q.pop();
for (int to: graph[node]) {
if (dist[to] == -1) {
dist[to] = dist[node] + 1;
q.push(to);
}
}
}
cout << dist[d] - 1 << '\n';
}
}
