Submission #538287

#	Time	Username	Problem	Language	Result	Execution time	Memory
538287		timreizin	Linear Garden (IOI08_linear_garden)	C++17	Compilation error	0 ms	0 KiB

linear_garden

#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,pocnt,lzcnt")

#include <iostream>
#include <vector>
#include <queue>
#include <algorithm>
#include <array>
#include <set>
#include <string>

using namespace std;

using ll = long long;

const ll MOD = 1e9 + 7;

bool check(string s)
{
#pragma GCC ivdep
    for (int i = 0; i < s.size(); ++i)
    {
        int cntL = 0;
        for (int l = 1; i + l - 1 < s.size(); ++l)
        {
            cntL += s[i + l - 1] == 'L';
            int cntP = l - cntL;
            if (abs(cntP - cntL) > 2) return false;
        }
    }
    return true;
}

int main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n;
    ll m;
    string s;
    cin >> n >> m >> s;
    vector<string> gardens;
#pragma GCC ivdep
    for (ll i = 0; i < (1 << n); ++i)
    {
        string s(n, 'L');
#pragma GCC ivdep
        for (int j = 0; j < n; ++j) if (i & (1 << j)) s[j] = 'P';
        if (check(s)) gardens.push_back(s);
    }
    sort(gardens.begin(), gardens.end());
    for (int i = 0; i < gardens.size(); ++i)
    {
        if (gardens[i] == s)
        {
            cout << (i + 1) % m;
            break;
        }
    }
    return 0;
}

Compilation message (stderr)

cc1plus: error: attribute 'pocnt' argument 'target' is unknown
linear_garden.cpp: In function 'bool check(std::string)':
linear_garden.cpp:21:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for (int i = 0; i < s.size(); ++i)
      |                     ~~^~~~~~~~~~
linear_garden.cpp:24:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         for (int l = 1; i + l - 1 < s.size(); ++l)
      |                         ~~~~~~~~~~^~~~~~~~~~
linear_garden.cpp: In function 'int main()':
linear_garden.cpp:51:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     for (int i = 0; i < gardens.size(); ++i)
      |                     ~~^~~~~~~~~~~~~~~~