#define _CRT_SECURE_NO_WARNINGS

#include <bits/stdc++.h>

//#define FAST_ALLOCATOR_MEMORY 2e8
//#include "optimization.h"

using namespace std;

#define ALL(x) x.begin(), x.end()

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int> pii;

const int inf = (int)1e9;
const ll md = (ll)1e9 + 7, inf64 = (ll)1e18;

int main() {
    iostream::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);

#ifdef LOCAL
    freopen("C:\\Users\\aytel\\CLionProjects\\common\\input.txt", "r", stdin);
    freopen("C:\\Users\\aytel\\CLionProjects\\common\\output.txt", "w", stdout);
#endif

    int n, m;
    cin >> n >> m;

    ll sum = 0;
    vector<ll> ends;
    while (n--) {
        ll c, t;
        cin >> c >> t;
        sum += c * t;
        ends.push_back(sum);
    }

    while (m--) {
        ll t;
        cin >> t;
        cout << lower_bound(ends.begin(), ends.end(), t) - ends.begin() + 1 << '\n';
    }

    return 0;
}