Submission #238558

#	Time	Username	Problem	Language	Result	Execution time	Memory
238558		vankata	Trener (COCI20_trener)	C++14	55 / 110	2081 ms	1904 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,lm=0,ll=0,l=0;
    string s="";
    for(i=0;i<k;i++)
    {
        for(j=0;j<k;j++)
        {
            lm=ll=0;
            for(l=0;l<v[(t%2)^1][j].size();l++)
            {
                if(v[t%2][i][l]!=v[(t%2)^1][j][l])lm=-1;

                if(v[t%2][i][l+1]!=v[(t%2)^1][j][l])ll=-1;
            }
            if(!lm||!ll)
            {
                dp[t][i]+=dp[t-1][j];
                if(dp[t][i]>=MOD)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 comp(int)':
trener.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(l=0;l<v[(t%2)^1][j].size();l++)
                     ~^~~~~~~~~~~~~~~~~~~~~
trener.cpp: In function 'void read()':
trener.cpp:40:13: warning: unused variable 't' [-Wunused-variable]
     int i,j,t=1;
             ^

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