Submission #493072

#	Time	Username	Problem	Language	Result	Execution time	Memory
493072		_adis	Combo (IOI18_combo)	C++14	100 / 100	50 ms	584 KiB

combo

/*input

*/
/*inhuman strength
#pragma GCC optimize("O2,unroll-loops")
#pragma GCC target("avx,avx2")
*/
#include<bits/stdc++.h>
#include "combo.h"
#define foR(i,a,b) for(int i=a;i<=b;i++)
#define roF(i,a,b) for(int i=a;i>=b;i--)
#define _ff exit(0);
#define Sort(i,a,b) sort(i+a,i+a+b)
#define SORT(i,a,b) sort(i+a,i+a+b,greater<int>())
#define code_chef for(int i=1,x=0;i<=100000;i++){x++;cerr<<x;}
#define TLE cerr<<"\n" <<  1.0*clock()/CLOCKS_PER_SEC << "\n";
#define F first
#define S second
#define sperm(a) next_permutation(a.begin(),a.end());
#define all(a) a.begin(),a.end()
#define nxhieu_speed cin.tie(0)->sync_with_stdio(false);
#define i2 pair<int,int>
#define getbit(x,i) ((x>>(i))&1)
#define batbit(x,i) (x|(1ll<<(i)))
#define tatbit(x,i) (x&~(1<<(i)))
#define RTE cout<<-1;_ff
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int l, int r) {return l + rng() % (r - l + 1);}
int dx[] = {0, 0, 1, -1};
int dy[] = {1, -1, 0, 0};
struct Triple
{
	int Fi;
	int Se;
	int Th;
};
bool operator >(Triple A, Triple B)
{
	if (A.Fi == B.Fi && A.Se == B.Se) return (A.Th > B.Th);
	if (A.Fi == B.Fi && A.Se != B.Se) return (A.Se > B.Se);
	return (A.Fi > B.Fi);
}
bool operator <(Triple A, Triple B)
{
	if (A.Fi == B.Fi && A.Se == B.Se) return (A.Th < B.Th);
	if (A.Fi == B.Fi && A.Se != B.Se) return (A.Se < B.Se);
	return (A.Fi < B.Fi);
}
bool operator ==(Triple A, Triple B)
{
	return (A.Fi == B.Fi && A.Se == B.Se && A.Th == B.Th);
}
int Money;
string guess_sequence(int n)
{
	string s = "";
	Money = press("AB");

	vector<char> S;

	if (Money >= 1)
	{
		Money = press("A");


		if (Money == 1)
		{
			S.push_back('B');
			S.push_back('X');
			S.push_back('Y');
			s = s + 'A';
		}
		else
		{
			S.push_back('A');
			S.push_back('X');
			S.push_back('Y');
			s = s + 'B';
		}
	}
	else {
		Money = press("X");


		if (Money == 1)
		{
			s = s + 'X';
			S.push_back('B');
			S.push_back('A');
			S.push_back('Y');
		}
		else
		{
			s = s + 'Y';
			S.push_back('B');
			S.push_back('X');
			S.push_back('A');
		}
	}
	for (int i = 2; i < n; ++i)
	{
		Money = press( s + S[0] + s + S[1] + S[0] + s + S[1] + S[1] + s + S[1] + S[2] );
		if (Money == s.size() + 1) s = s + S[0];
		else if (Money == s.size() + 2) s = s + S[1];
		else s = s + S[2];
	}
	if (s.size() != n)
	{
		Money = press(s + S[0]);
		if (Money == n) s = s + S[0];
		else
		{
			Money = press(s + S[1]);
			if (Money == n) s = s + S[1];
			else s = s + S[2];
		}
	}
	return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:104:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |   if (Money == s.size() + 1) s = s + S[0];
      |       ~~~~~~^~~~~~~~~~~~~~~
combo.cpp:105:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  105 |   else if (Money == s.size() + 2) s = s + S[1];
      |            ~~~~~~^~~~~~~~~~~~~~~
combo.cpp:108:15: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  108 |  if (s.size() != n)
      |      ~~~~~~~~~^~~~

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95