#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fr(x, l, r) for(int x = l; x <= r; x++)
#define rf(x, l, r) for(int x = l; x >= r; x--)
#define fe(x, y) for(auto& x : y)
#define fi first
#define se second
#define m_p make_pair
#define pb push_back
#define pw(x) (ull(1) << ull(x))
#define all(x) (x).begin(),x.end()
#define sz(x) (int)x.size()
#define mt make_tuple
#define ve vector
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair <ll,ll> pll;
typedef pair <int,int> pii;
typedef pair <ld,ld> pld;
template<typename T>
using oset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define fbo find_by_order
#define ook order_of_key
template<typename T>
bool umn(T& a, T b) { return a > b ? a = b, 1 : 0; }
template<typename T>
bool umx(T& a, T b) { return a < b ? a = b, 1 : 0; }
const ll inf = 1e18;
const int intf = 1e9;
const ll mod = 1e9 + 7;
const ld eps = 0.00000001;
const ll N = 1e4 + 5;
ll d[N], c[N];
int main(){
#ifdef LOCAL
freopen("input.txt", "r", stdin);
freopen("output.txt","w", stdout);
ios_base::sync_with_stdio(0);
cin.tie(0);
#else
// freopen("mountains.in", "r", stdin);
// freopen("mountains.out","w", stdout);
ios_base::sync_with_stdio(0);
cin.tie(0);
#endif
int n, q;
cin >> n >> q;
if(n <= 1e4){
fr(i, 0, n - 1){
cin >> d[i] >> c[i];
}
while(q--){
int r, v;
cin >> r >> v;
r--;
int di = d[r] - 1, ans = -1;
fr(i, r, n - 1){
if(di < d[i]){
di = d[i] - 1;
v -= c[i];
}
if(v <= 0){
ans = i;
break;
}
}
cout << ans + 1 << endl;
}
}
return 0;
}
