///////////////////////////////////////////////////////////////////////////////////////////////
#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
#define FAST_IO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define FILE_IO(x) freopen((string(x) + ".in").c_str(), "r", stdin); freopen((string(x) + ".out").c_str(), "w", stdout)
#define f first
#define s second
#define x1 x1qwer
#define y1 y1qwer
#define right right123
#define left left123
#define foreach(it, v) for (auto it : v)
#define rep(it, n) for (int it = 0; it < n; ++it)
#define forin(it, l, r) for (int it = l; it < r; ++it)
#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;
typedef pair<ll, ll> pll;
const double DINF = numeric_limits<double>::infinity();
const ll MOD = 1e9 + 7;
const double EPS = 1e-7;
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
mt19937 mmtw_(MOD);
uniform_int_distribution<ll> rd_;
ll randomll() { return rd_(mmtw_);}
ll rnd(ll x, ll y) { return rd_(mmtw_) % (y - x + 1) + x; }
////////////////////////////////////////////////////////////////////////////////////////////////
struct pt {
int x, y;
int id;
};
inline bool operator==(const pt &a, const pt &b) {
return a.x == b.x && a.y == b.y;
}
inline pt operator-(const pt &a) {
return {-a.x, -a.y};
}
inline pt operator-(const pt &a, const pt &b) {
return {a.x - b.x, a.y - b.y};
}
inline ll dot(const pt &a, const pt &b) {
return 1LL * a.x * b.x + 1LL * a.y * b.y;
}
inline ll cross(const pt &a, const pt &b) {
return 1LL * a.x * b.y - 1LL * a.y * b.x;
}
inline ll dd0(const pt &a) {
return dot(a, a);
}
const int MAXN = 1e5 + 5;
int n;
pt a[MAXN];
inline int md(int x) {
if (x >= n) return x - n;
if (x < 0) return x + n;
return x;
}
int findLowest() {
int s = 0;
for (int i = 0; i < n; ++i) {
ll cr = cross(a[i], a[s] - a[i]);
if (cr > 0 || (cr == 0 && dd0(a[i]) < dd0(a[s]))) {
s = i;
}
}
return s;
}
int findHighest() {
int t = 0;
for (int i = 0; i < n; ++i) {
ll cr = cross(a[i], a[t] - a[i]);
if (cr < 0 || (cr == 0 && dd0(a[i]) < dd0(a[t]))) {
t = i;
}
}
return t;
}
struct seg {
pt a, b;
};
seg s[MAXN];
bool inter(const pt &a, const seg &b) {
if (a == b.a || a == b.b) return false;
if (!(cross(a, b.b) >= 0 && cross(a, b.a) <= 0)) return false;
if (!(cross(b.b - b.a, a - b.a) <= 0 && cross(b.b - b.a, -b.a) >= 0)) return false;
return true;
}
bool check(const pt &a) {
for (int i = 0; i < n; ++i) {
if (inter(a, s[i])) return false;
}
return true;
}
vector<int> solve() {
vector<int> res;
for (int i = 0; i < n; ++i) {
if (check(s[i].a)) res.push_back(s[i].a.id);
if (check(s[i].b)) res.push_back(s[i].b.id);
}
sort(all(res));
res.erase(unique(all(res)), res.end());
return res;
}
int main() {
FAST_IO;
cin >> n;
rep(i, n) {
cin >> a[i].x >> a[i].y;
a[i].id = i + 1;
}
assert(n > 2);
int lowest = findLowest();
if (cross(a[md(lowest - 1)] - a[lowest], a[md(lowest + 1)] - a[lowest]) < 0) {
reverse(a, a + n);
}
rotate(a, a + findLowest(), a + n);
n = findHighest() + 1;
int sz = 0;
for (int i = 0; i + 1 < n; ++i) {
if (cross(a[i], a[i + 1] - a[i]) > 0) s[sz++] = {a[i], a[i + 1]};
}
n = sz;
vector<int> ans = solve();
cout << ans.size() << '\n';
for (auto it : ans) {
cout << it << ' ';
} cout << '\n';
}
