#include <bits/stdc++.h> 
 
using namespace std;  
 
typedef long long ll;  
typedef pair<int, int> ii;  
 
const int INF = 1e9;  
const ll LINF = 1e18;  
 
const int N = 2e5 + 5; 
const int LOG = 18;   
 
int n, q; 
vector<int> adj[N]; 
 
int depth[N]; // depth[u] = Độ sâu của đỉnh u 
int up[LOG][N]; // up[i][u] = Tổ tiên thứ 2^i của u 
 
void dfs(int u, int p) {
	up[0][u] = p;   
	for (int i = 1; i < LOG; i++) {
		up[i][u] = up[i - 1][up[i - 1][u]]; 
	}
 
	for (int v : adj[u]) {
		if (v == p) continue;  
		depth[v] = depth[u] + 1; 
		dfs(v, u); 
	}
}
 
// Tổ tiên thứ k của u 
int findKthAncestor(int u, int k) {
	if (k > depth[u]) return -1; 
	for (int i = 0; i < LOG; i++) {
		if ((k >> i) & 1) {
			u = up[i][u]; 
		}
	}
	return u; 
}
 
int main() {
	ios::sync_with_stdio(false); 
	cin.tie(nullptr); 	
	cin >> n >> q; 
 
	for (int u = 2; u <= n; u++) {
		int p; cin >> p;  
		adj[u].push_back(p); 
		adj[p].push_back(u); 
	}
 
	depth[1] = 0; 
	dfs(1, 1); 
 
	while (q--) {
		int u, k; 
		cin >> u >> k;  
		cout << findKthAncestor(u, k) << '\n'; 
	}
}

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