Submission #238562

#	Time	Username	Problem	Language	Result	Execution time	Memory
238562		vankata	Trener (COCI20_trener)	C++14	0 / 110	363 ms	28408 KiB

trener

#include<bits/stdc++.h>
using namespace std;

const int MAXN = 2048;
const int MOD = (int)(1e9+7);

map<string,int>mp;

long long n,k;

void read()
{
    int i,j,l;
    long long ans = 0;
    cin>>n>>k;
    string s,t,q;
    int lm=0;
    for(i=0;i<n;i++)
    {
        for(j=0;j<k;j++)
        {
            cin>>s;

            if(!i)mp[s]=1;
            if(i==n-1)
            {
                ans+=mp[s];
                ans%=MOD;
                continue;
            }
            lm=0;
            for(l=1;l<s.size();l++)
                if(s[i]!=s[i-1])lm=true;

            for(l=0;l<26;l++)
            {
                t=s+char('a'+l);
                q=char('a'+l)+s;
                mp[t]+=mp[s];
                mp[t]%=MOD;
                mp[q]+=mp[s];
                mp[q]%=MOD;
            }
            if(lm==false)
            {
                t=s+s[0];
                mp[t]--;
                mp[t]+=MOD;
                mp[t]%=MOD;
            }
        }
    }
    cout<<ans<<endl;
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    read();
    return 0;
}

Compilation message (stderr)

trener.cpp: In function 'void read()':
trener.cpp:32:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(l=1;l<s.size();l++)
                     ~^~~~~~~~~

• Subtask 1: 0 / 22
• Subtask 2: 0 / 33
• Subtask 3: 0 / 55