#include <bits/stdc++.h>
#define ar array
using namespace std;
signed main() {
ios_base::sync_with_stdio(false);
cout.tie(0); cin.tie(0);
int n; cin >> n;
vector<int> L(n+1), R(n+1);
for(int i=1; i<=n; i++) cin >> L[i] >> R[i];
vector<ar<int, 3> > G[n+1][n+1];
int dp[n+1][n+1];
for(int i=1; i<=n; i++) G[i][i].push_back({ L[i], R[i], 1 });
for(int i=1; i<=n; i++) {
for(int j=i+1; j<=n; j++) {
G[i][j].push_back({ i+1, j, 0 });
G[i][j].push_back({ i, j-1, 0 });
}
}
for(int i=1; i<=n; i++) {
int mn = 1e9, mx = 0;
for(int j=i; j<=n; j++) {
mn = min(mn, L[j]);
mx = max(mx, R[j]);
G[i][j].push_back({ mn, j, 1 });
G[i][j].push_back({ i, mx, 1 });
}
}
int q; cin >> q;
priority_queue<ar<int, 3>, vector<ar<int, 3> >, greater<> > pq;
while(q--) {
int x; cin >> x;
for(int i=1; i<=n; i++)
for(int j=i; j<=n; j++) dp[i][j] = 1e9;
pq.push({ dp[x][x] = 0, x, x });
while(!pq.empty()) {
auto [d, l, r] = pq.top(); pq.pop();
if(dp[l][r] != d) continue;
for(auto [l2, r2, w] : G[l][r])
if(dp[l2][r2] > d + w) pq.push({ dp[l2][r2] = d + w, l2, r2 });
}
cout << (dp[1][n] == 1e9 ? -1 : dp[1][n]) << '\n';
}
}
