Submission #238556

#	Time	Username	Problem	Language	Result	Execution time	Memory
238556		vankata	Trener (COCI20_trener)	C++14	55 / 110	2087 ms	1072 KiB

trener

#include<bits/stdc++.h>
using namespace std;
const int MAXN = (int)(1<<11);
const int MOD = (int)(1e9+7);
int n,k;
vector<string>v[2];
long long dp[MAXN][MAXN];
bool cmp(string a,string b)
{
    for(size_t i=0;i<a.size();i++)
    {
        if(a[i]!=b[i])return false;
    }return true;
}
void comp(int t)
{
    int i,j;
    string s="";
    for(i=0;i<k;i++)
    {
        for(j=0;j<k;j++)
        {
            s=v[(t%2)^1][j];
            s=v[t%2][i][0]+s;
            if(cmp(s,v[t%2][i]))
            {
                dp[t][i]+=dp[t-1][j];
                dp[t][i]%=MOD;

            }
            else
            {
                s=v[(t%2)^1][j] + v[t%2][i][t];
                if(cmp(s,v[t%2][i])){dp[t][i]+=dp[t-1][j];dp[t][i]%=MOD;
               }
            }
        }
    }
}
void read()
{
    int i,j,t=1;
    string s;
    cin>>n>>k;
    for(i=0;i<k;i++)
    {
        dp[0][i]=1;
        cin>>s;
        v[0].push_back(s);
    }
    for(i=1;i<n;i++)
    {
        v[i%2].clear();
        for(j=0;j<k;j++)
        {
            cin>>s;
            v[i%2].push_back(s);
        }
        comp(i);
    }
    long long ans = 0;
    for(i=0;i<k;i++)
    {
        ans+=dp[n-1][i];
    }
    ans%=MOD;cout<<ans<<'\n';
}
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:42:13: warning: unused variable 't' [-Wunused-variable]
     int i,j,t=1;
             ^

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