Submission #956277

#	Time	Username	Problem	Language	Result	Execution time	Memory
956277		mostafa133	Combo (IOI18_combo)	C++14	0 / 100	0 ms	344 KiB

combo

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include "combo.h"
typedef long long ll;
typedef long double ld;
using namespace std;
using namespace __gnu_pbds;
using ordered_set = tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update>;
#define all(x) x.begin(), x.end()
#define fast ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0)
const ll mod = 998244353;
ld fpow(ld a, ll b, ll m)
{
    a;
    ld res = 1;
    while (b > 0)
    {
        if (b % 2 == 1)
        {
            res = res * a;
        }
        a = a * a;
        b /= 2;
    }
    return res;
}
std::string guess_sequence(int N)
{
    string x = "ABXY", y;
    char z;
    string ans;
    ll b = press("A");
    if (b)
    {
        ans.push_back('A');
        y = "BXBXXXY";
        z = 'Y';
    }
    else if (press("B"))
    {
        ans.push_back('B');
        y = "AXAXYXX";
        z = 'Y';
    }
    else if (press("X"))
    {
        ans.push_back('X');
        y = "ABABYBB";
        z = 'Y';
    }
    else
    {
        ans.push_back('Y');
        y = "ABABXBB";
        z = 'X';
    }
    cout << ans << ' ';
    for (int i = 1; i < N-1; i++)
    {
        b = press(ans + y.substr(0, 1) + ans + y.substr(1, 2) + ans + y.substr(3, 2) + ans + y.substr(5, 2));
        if (b == ans.size() + 1)
        {
            ans.push_back(y[0]);
        }
        else if (b == ans.size() + 2)
        {
            ans.push_back(y[1]);
        }
        else
        {
            ans.push_back(z);
        }
    }
    if(press(ans+'A'+ans+'B')!=ans.size())
    {
        if(press(ans+'A') !=ans.size())
        {
            ans.push_back('A');
        }
        else
        {
            ans.push_back('B');
        }
    }
    else
    {
        if(press(ans+'X') !=ans.size())
        {
            ans.push_back('X');
        }
        else
        {
            ans.push_back('Y');
        }
    }
    cout << ans<<' ';
    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'ld fpow(ld, ll, ll)':
combo.cpp:15:5: warning: statement has no effect [-Wunused-value]
   15 |     a;
      |     ^
combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:62:15: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |         if (b == ans.size() + 1)
      |             ~~^~~~~~~~~~~~~~~~~
combo.cpp:66:20: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |         else if (b == ans.size() + 2)
      |                  ~~^~~~~~~~~~~~~~~~~
combo.cpp:75:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |     if(press(ans+'A'+ans+'B')!=ans.size())
      |        ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
combo.cpp:77:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |         if(press(ans+'A') !=ans.size())
      |            ~~~~~~~~~~~~~~~^~~~~~~~~~~~
combo.cpp:88:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |         if(press(ans+'X') !=ans.size())
      |            ~~~~~~~~~~~~~~~^~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95