Submission #444755

#	Time	Username	Problem	Language	Result	Execution time	Memory
444755		ics0503	Chameleon's Love (JOI20_chameleon)	C++17	64 / 100	41 ms	472 KiB

chameleon

#include "chameleon.h"
#include <vector>
#include<algorithm>
using namespace std;

int cck[1212];
int validation(int n, int i, int j) {
	vector<int>qr;
	for (int p = 1; p <= 2 * n; p++) {
		if (i == p || j == p)continue;
		qr.push_back(p);
	}
	int Q = Query(qr);
	if (Q != n) {
		cck[i] = cck[j] = 1;
		Answer(i, j);
		return 1;
	}
	return 0;
}

int S4(int who, vector<int>Y, int n) {
	int sz = Y.size(), i, j;
	if (sz == 1) {
		return validation(n, who, Y[0]);
	}
	vector<int>L, R;
	for (i = 0; i < sz / 2; i++)L.push_back(Y[i]);
	for (i = sz / 2; i < sz; i++)R.push_back(Y[i]);
	L.push_back(who); int a = Query(L); L.pop_back(); 
	if (a != L.size() + 1) if (S4(who, L, n))return 1;
	R.push_back(who); int b = Query(R); R.pop_back();
	if (b != R.size() + 1) if (S4(who, R, n))return 1;
	return 0;
}


vector<int>AX, AY;
int pk[1212];
void Solve(int n) {
	int i, j;
	while (1) {
		vector<int>X;
		vector<int>aa;
		for (i = 1; i <= 2 * n; i++)aa.push_back(i);
		random_shuffle(aa.begin(), aa.end());
		for (i = 1; i <= 2 * n; i++)pk[i] = 0;
		int cnt = 0;
		for (auto i: aa) {
			if (cck[i])continue;
			cnt++;
			X.push_back(i);
			if (Query(X) != X.size()) {
				X.pop_back();
			}
			else {
				pk[i] = 1;
			}
		}
		if (cnt == 0)break;
		AX.clear();
		AY.clear();
		for (i = 1; i <= 2 * n; i++) {
			if (cck[i])continue;
			if (pk[i])AX.push_back(i);
			else AY.push_back(i);
		}
		for (i = 0; i < AX.size(); i++) {
			int who = AX[i];
			vector<int>Y;
			for (j = 0; j < AY.size(); j++) {
				int v = AY[j];
				if (cck[v])continue;
				Y.push_back(v);
			}
			S4(who, Y, n);
		}
	}
}

Compilation message (stderr)

chameleon.cpp: In function 'int S4(int, std::vector<int>, int)':
chameleon.cpp:31:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |  if (a != L.size() + 1) if (S4(who, L, n))return 1;
      |      ~~^~~~~~~~~~~~~~~
chameleon.cpp:33:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |  if (b != R.size() + 1) if (S4(who, R, n))return 1;
      |      ~~^~~~~~~~~~~~~~~
chameleon.cpp:23:24: warning: unused variable 'j' [-Wunused-variable]
   23 |  int sz = Y.size(), i, j;
      |                        ^
chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:53:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |    if (Query(X) != X.size()) {
      |        ~~~~~~~~~^~~~~~~~~~~
chameleon.cpp:68:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |   for (i = 0; i < AX.size(); i++) {
      |               ~~^~~~~~~~~~~
chameleon.cpp:71:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |    for (j = 0; j < AY.size(); j++) {
      |                ~~^~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 0 / 36