#pragma warning(suppress : 4996)
#include<bits/stdc++.h>
using namespace std;
using i64 = long long;
#define L(i,j,k) for(int i=j;i<=k;i++)
#define R(i,j,k) for(int i=j;i>=k;i--)
constexpr int _N = 5E5 + 500;
struct worker {
int salary, qualifications, id;
bool operator < (worker& b) {
return salary * b.qualifications > b.salary * b.qualifications;
}
}A[_N];
int cnt[_N], N; i64 W, buc[_N];
i64 T[_N];
void add(int x,int v) {
while (x <= N) {
T[x] += v;
cnt[x]++;
x += x & -x;
}
}
pair<i64, int> query(i64 limit) {
i64 sum = 0, total = 0, ind = 0;
R(i, 18, 0) {
int new_ind = ind + (1 << i);
if (new_ind > N) continue;
if (sum + T[new_ind] > limit) continue;
ind = new_ind;
sum += T[ind]; total += cnt[ind];
}
return make_pair(sum, total);
}
int main() {
scanf("%d%lld", &N, &W);
L(i, 1, N) {
scanf("%d%d", &A[i].salary, &A[i].qualifications);
buc[A[i].qualifications]++;
A[i].id = i;
}
sort(A + 1, A + 1 + N);
L(i, 1, _N - 1) buc[i] += buc[i - 1];
int starting_position = 0, best = -1;
i64 old_fraction_top = 0, old_fraction_bottom = 0;
R(i, N, 1) {
int p = buc[A[i].qualifications]--;
add(p, A[i].qualifications);
auto res = query(W * A[i].qualifications / A[i].salary);
i64 sum = res.first; int cnt = res.second;
i64 cur_fraction_top = A[i].salary * sum;
i64 cur_fraction_bottom = A[i].qualifications;
if (cnt > best || (cnt == best && cur_fraction_top * old_fraction_bottom < old_fraction_top * cur_fraction_bottom)) {
best = cnt;
starting_position = i;
old_fraction_bottom = cur_fraction_bottom;
old_fraction_top = cur_fraction_top;
}
}
sort(A + starting_position, A + N + 1, [&](auto& a, auto& b) {
return a.qualifications < b.qualifications;
});
cout << best << '\n';
L(i, 0, best - 1) cout << A[starting_position + i].id << '\n';
}
