Submission #867144

#	Time	Username	Problem	Language	Result	Execution time	Memory
867144		HoriaHaivas	Parametriziran (COCI19_parametriziran)	C++14	99 / 110	1133 ms	65536 KiB

Main

/*
    "care a facut teste cu Lattice reduction attack e ciudat"
    "linistiti va putin"
    - 2023 -
*/
#include<bits/stdc++.h>
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "
#warning ai grija la ? ca l ai transformat in {
#pragma GCC optimize("Ofast")

using namespace std;

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        // http://xorshift.di.unimi.it/splitmix64.c
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};

const int mod=1e9+9;
const int base=29;

string s[50001];
unordered_map<int,int,custom_hash> hashcount[(1<<6)];

int main()
{
    ifstream fin(".in");
    ofstream fout(".out");
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int i,j,n,m,ans,mask,hashbuild,mask2;
    bool ok;
    cin >> n >> m;
    for (j=1; j<=n; j++)
    {
        cin >> s[j];
        for (i=0; i<s[j].size(); i++)
        {
            if (s[j][i]=='?')
                s[j][i]='{';///urmatorul caracter dupa z
        }
        for (mask=1; mask<(1<<(m)); mask++)
        {
            hashbuild=0;
            for (i=0; i<s[j].size(); i++)
            {
                if (mask&(1<<i))
                    hashbuild=((hashbuild*base)%mod+(s[j][i]-'a'+1))%mod;
            }
            hashcount[mask][hashbuild]++;
        }
    }
    ans=0;
    for (j=1; j<=n; j++)
    {
        mask=0;
        for (i=0; i<s[j].size(); i++)
        {
            if (s[j][i]!='{')
            {
                mask=mask|(1<<i);
            }
        }
        if (mask!=0)
        {
            for (mask2=0; mask2<=mask; mask2++)
            {
                ok=true;
                for (i=0; i<s[j].size() && ok; i++)
                {
                    if ((mask2&(1<<i)) && !(mask&(1<<i)))
                        ok=false;
                }
                if (ok)
                {
                    hashbuild=0;
                    for (i=0; i<s[j].size(); i++)
                    {
                        if (mask&(1<<i))
                        {
                            if (mask2&(1<<i))
                                hashbuild=((hashbuild*base)%mod+('{'-'a'+1))%mod;
                            else
                                hashbuild=((hashbuild*base)%mod+(s[j][i]-'a'+1))%mod;
                        }
                    }
                    ans+=hashcount[mask][hashbuild];
                }
            }
        }
        else
        {
            ans+=n;
        }
    }
    cout << (ans-n)/2;
    return 0;
}

Compilation message (stderr)

parametriziran.cpp:9:2: warning: #warning ai grija la ? ca l ai transformat in { [-Wcpp]
    9 | #warning ai grija la ? ca l ai transformat in {
      |  ^~~~~~~
parametriziran.cpp: In function 'int main()':
parametriziran.cpp:48:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         for (i=0; i<s[j].size(); i++)
      |                   ~^~~~~~~~~~~~
parametriziran.cpp:56:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |             for (i=0; i<s[j].size(); i++)
      |                       ~^~~~~~~~~~~~
parametriziran.cpp:68:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |         for (i=0; i<s[j].size(); i++)
      |                   ~^~~~~~~~~~~~
parametriziran.cpp:80:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |                 for (i=0; i<s[j].size() && ok; i++)
      |                           ~^~~~~~~~~~~~
parametriziran.cpp:88:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |                     for (i=0; i<s[j].size(); i++)
      |                               ~^~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 11 / 11
• Subtask 3: 11 / 11
• Subtask 4: 11 / 11
• Subtask 5: 11 / 11
• Subtask 6: 11 / 11
• Subtask 7: 11 / 11
• Subtask 8: 11 / 11
• Subtask 9: 11 / 11
• Subtask 10: 0 / 11