This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "insects.h"
#include "bits/stdc++.h"
using namespace std;
int min_cardinality(int N) {
set<int> inside, outside, aIn;
for (int i = 0; i < N; ++i) {
move_inside(i);
if (press_button() > 1) {
if (i == N - 1) {
aIn.insert(i);
} else {
outside.insert(i);
move_outside(i);
}
} else {
inside.insert(i);
}
}
int k = inside.size();
int l = 1, r = N / k + 1;
while (l + 1 < r) {
int m = (l + r + 1) / 2;
set<int> nIn, nOut;
for (auto e: outside) {
if ((inside.size() + nIn.size() + aIn.size()) == m * k) break;
move_inside(e);
if (press_button() > m) {
nOut.insert(e);
move_outside(e);
} else nIn.insert(e);
}
if ((inside.size() + nIn.size() + aIn.size()) == m * k) {
l = m;
outside = nOut;
inside.insert(nIn.begin(), nIn.end());
inside.insert(aIn.begin(), aIn.end());
aIn.clear();
} else {
r = min(m, (int)(inside.size() + nIn.size() + aIn.size())/k + 1);
int nM = (l + r + 1) / 2 - l;
nIn.insert(aIn.begin(), aIn.end());
aIn.clear();
for (int i = 0; i < nM && !nIn.empty(); ++i) {
aIn.insert(*nIn.begin());
nIn.erase(nIn.begin());
}
for (auto e: nIn) {
move_outside(e);
}
outside = nIn;
}
}
return l;
}
Compilation message (stderr)
insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:27:50: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
27 | if ((inside.size() + nIn.size() + aIn.size()) == m * k) break;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
insects.cpp:34:49: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
34 | if ((inside.size() + nIn.size() + aIn.size()) == m * k) {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
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