#ifndef LOCAL
#include "chameleon.h"
#endif // LOCAL
#ifdef LOCAL
#include<bits/stdc++.h>
using namespace std;
namespace {
using std::exit;
using std::fprintf;
using std::printf;
using std::scanf;
constexpr int Q_MAX = 20'000;
constexpr int N_MAX = 500;
int N;
int Y[N_MAX * 2 + 1], C[N_MAX * 2 + 1], L[N_MAX * 2 + 1];
int query_count = 0;
int answer_count = 0;
bool finishes[N_MAX * 2 + 1];
void WrongAnswer(int code) {
printf("Wrong Answer [%d]\n", code);
exit(0);
}
} // namespace
int Query(const std::vector<int> &p) {
if (++query_count > Q_MAX) WrongAnswer(3);
bool presents[N_MAX * 2 + 1];
for (int i = 1; i <= N * 2; ++i) presents[i] = false;
for (const int k : p) {
if (k <= 0 || k > N * 2) WrongAnswer(1);
if (presents[k]) WrongAnswer(2);
presents[k] = true;
}
bool colors[N_MAX + 1];
for (int j = 1; j <= N; ++j) colors[j] = false;
int color_count = 0;
for (int i = 1; i <= N * 2; ++i) {
if (!presents[i]) continue;
const int color = presents[L[i]] ? C[L[i]] : C[i];
if (!colors[color]) {
++color_count;
colors[color] = true;
}
}
return color_count;
}
void Answer(int a, int b) {
//cerr << a << ' ' << b << '\n';
++answer_count;
if (a <= 0 || a > N * 2) WrongAnswer(4);
if (b <= 0 || b > N * 2) WrongAnswer(4);
if (finishes[a]) WrongAnswer(5);
finishes[a] = true;
if (finishes[b]) WrongAnswer(5);
finishes[b] = true;
if (C[a] != C[b]) WrongAnswer(6);
}
#endif //LOCAL
#include <bits/stdc++.h>
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define eb emplace_back
using namespace std;
typedef long long ll;
typedef pair<int, int> ii;
const int maxn = 1005;
int n;
vector<int> ind[4];
bool found[maxn];
vector<int> adj[maxn];
void Add(vector<int> vec, int u)
{
int lo = 0, hi = vec.size() - 1, mid;
while(lo <= hi){
mid = (lo + hi) / 2;
vector<int> tmp;
for(int i = 0; i <= mid; ++i)
tmp.eb(vec[i]);
tmp.eb(u);
if(Query(tmp) != tmp.size())
hi = mid - 1;
else
lo = mid + 1;
}
adj[u].eb(vec[lo]); adj[vec[lo]].eb(u);
vector<int> nxt;
for(int i = lo + 1; i < vec.size(); ++i)
nxt.eb(vec[i]);
nxt.eb(u);
if(Query(nxt) != nxt.size()){
nxt.pop_back();
Add(nxt, u);
}
}
void Solve(int _N)
{
n = _N;
for(int i = 1; i <= 2 * n; ++i){
vector<bool> kt(4, false);
for(int j = 0; j < 4; ++j){
vector<int> v(ind[j]); v.eb(i);
if(Query(v) < v.size()){
Add(ind[j], i);
}
else{
kt[j] = true;
}
}
for(int j = 0; j < 4; ++j){
if(kt[j]){
ind[j].eb(i);
break;
}
}
}
auto check = [&](int a, int b) -> bool
{
vector<int> vi;
for(int i = 1; i <= 2 * n; ++i){
if(i != a && i != b)
vi.eb(i);
}
return vi.size() != N;
};
for(int i = 1; i <= 2 * n; ++i){
if(found[i]) continue;
for(int j : adj[i]){
if(found[j]) continue;
if(check(i, j)){
found[i] = found[j] = 1;
Answer(i, j);
break;
}
}
}
}
#ifdef LOCAL
int main() {
#ifdef LOCAL
freopen("A.INP", "r", stdin);
freopen("A.OUT", "w", stdout);
#endif // LOCAL
if (scanf("%d", &N) != 1) {
fprintf(stderr, "Error while reading input.\n");
exit(1);
}
for (int i = 1; i <= N * 2; ++i) {
if (scanf("%d", &Y[i]) != 1) {
fprintf(stderr, "Error while reading input.\n");
exit(1);
}
}
for (int i = 1; i <= N * 2; ++i) {
if (scanf("%d", &C[i]) != 1) {
fprintf(stderr, "Error while reading input.\n");
exit(1);
}
}
for (int i = 1; i <= N * 2; ++i) {
if (scanf("%d", &L[i]) != 1) {
fprintf(stderr, "Error while reading input.\n");
exit(1);
}
}
for (int i = 1; i <= N * 2; ++i) finishes[i] = false;
Solve(N);
if (answer_count != N) WrongAnswer(7);
printf("Accepted: %d\n", query_count);
return 0;
}
#endif // LOCAL
Compilation message
chameleon.cpp: In function 'void Add(std::vector<int>, int)':
chameleon.cpp:96:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(Query(tmp) != tmp.size())
~~~~~~~~~~~^~~~~~~~~~~~~
chameleon.cpp:103:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = lo + 1; i < vec.size(); ++i)
~~^~~~~~~~~~~~
chameleon.cpp:106:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(Query(nxt) != nxt.size()){
~~~~~~~~~~~^~~~~~~~~~~~~
chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:119:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(Query(v) < v.size()){
~~~~~~~~~^~~~~~~~~~
chameleon.cpp: In lambda function:
chameleon.cpp:140:25: error: 'N' was not declared in this scope
return vi.size() != N;
^
chameleon.cpp:140:25: note: suggested alternative: '_N'
return vi.size() != N;
^
_N
