#include <bits/stdc++.h>
#define nl '\n'
#define pb push_back
#define E exit(0)
#define all(v) v.begin(), v.end()
#define ff first
#define ss second
#define sz(s) (int)(s).size()
#define ll long long
#define int ll
#define oioi ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define vt vector
#define dbg(x) cerr << #x << " = " << x << nl
using namespace std;
using pii = pair<int, int>;
using vvi = vt< vt<int> >;
const int N = 1e6 + 5;
const int INF = 1e18 + 7;
const int MOD = 1e9 + 7;
const double eps = 1e-6;
const int B = 800;
void solve () {
int n, q;
cin >> n >> q;
vt<int> diam(n + 1), cap(n + 1), r(q + 1), v(q + 1);
for (int i = 1; i <= n; i++) cin >> diam[i] >> cap[i];
for (int i = 1; i <= q; i++) {
cin >> r[i] >> v[i];
if (v[i] <= cap[r[i]]) {
cout << r[i] << nl;
continue;
}
bool fnd = 0;
v[i] -= cap[r[i]];
for (int j = r[i] + 1; j <= n; j++) {
if (diam[j] > diam[r[i]]) {
if (v[i] <= cap[j]) {
cout << j << nl;
fnd = 1;
break;
}
else v[i] -= cap[j], r[i] = j;
}
}
if (!fnd) cout << "0\n";
}
cout << nl;
}
int test = 1;
signed main () {
// freopen(".in", "r", stdin);
// freopen(".out", "w", stdout);
oioi
// cin >> test;
while (test--) solve();
return 0;
}
