#include "bits/stdc++.h"
using namespace std;
#define int long long
int inf = 1e18;
signed main() {
int n, q;
cin >> n >> q;
vector <int> d(n + 1), c(n + 1); c[0] = 1e9;
for (int i = 1; i <= n; i ++) cin >> d[i] >> c[i];
// Graph / Tree ni yaratish
vector <vector <int>> g(n + 1);
priority_queue <pair <int, int>> pq;
for (int i = 1; i <= n; i ++) {
while (!pq.empty() && -pq.top().first < d[i]) {
g[i].push_back(pq.top().second);
pq.pop();
}
pq.push({-d[i], i});
}
while (!pq.empty()) {
g[0].push_back(pq.top().second);
pq.pop();
}
// UP va SUM ni hisoblash
int k = 21;
vector <vector <int>> up(n + 1, vector <int> (k));
vector <vector <int>> a(n + 1, vector <int> (k));
auto dfs = [&](auto&& dfs, int i, int p) -> void {
up[i][0] = p;
a[i][0] = c[i] + c[p];
// cout << i << ' ' << p << endl;
for (int j = 1; j < k; j ++) {
up[i][j] = up[up[i][j - 1]][j - 1];
a[i][j] = a[i][j - 1] + a[up[i][j - 1]][j - 1];
}
for (int x : g[i]) {
if (x != p) dfs(dfs, x, i);
}
};
dfs(dfs, 0, 0);
// SUM[P] >= V bo'lgan eng chuqur P ni topish (P I ning ajdodi)
auto find = [&](int i, int v) -> int {
if (c[i] >= v) return i;
int x = i;
for (int j = k - 1; j >= 0; j --) {
// cout << x << endl;
if (a[x][j] < v) x = up[x][j];
}
return up[x][0];
};
while (q --) {
int r, v;
cin >> r >> v;
cout << find(r, v) << endl;
}
return 0;
}
