#include "insects.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int min_cardinality(int n) {
vector<bool> in(n);
for (int i = 0; i < n; i++) {
move_inside(i);
if (press_button() == 2) move_outside(i);
else in[i] = 1;
}
int type = 0;
vector<bool> blocked(n);
for (int i = 0; i < n; i++) {
if (in[i]) {
type++;
blocked[i] = 1;
}
}
int lo = 0, hi = n / type - 1, add = 1;
while (lo < hi) {
int x = (lo + hi + 1) / 2, cnt = 0;
for (int i = 0; i < n; i++) {
if (blocked[i]) continue;
move_inside(i);
if (press_button() == add + x + 1) move_outside(i);
else in[i] = 1, cnt++;
}
for (int i = 0; i < n; i++) {
if (blocked[i]) continue;
if (in[i]) {
if (cnt == x * type) {
blocked[i] = 1;
} else {
in[i] = 0;
move_outside(i);
}
} else if (cnt != x * type) {
blocked[i] = 1;
}
}
if (cnt == x * type) lo = 0, hi -= x, add += x;
else hi = min(x - 1, cnt / type);
}
return lo + add;
}
