Submission #1119657

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119657		ezzzay	Trener (COCI20_trener)	C++14	110 / 110	925 ms	132200 KiB

trener

#include<bits/stdc++.h>
using namespace std;
#define itn long long
#define int long long
#define ff first
#define ss second
#define pb push_back
const int N=2003;
string a[N][N];
int dp[N][N];
const int mod=1e9+7;
signed main(){
    int n,k;
    cin>>n>>k;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=k;j++)cin>>a[i][j];
    }
    for(int i=1;i<=k;i++)dp[1][i]=1;
    
    for(int i=2;i<=n;i++){
        for(int j=1;j<=k;j++){
            string x=a[i][j];
            string y=x.substr(0,i-1);
            string w=x.substr(1,i-1);
            for(int p=1;p<=k;p++){
                if(a[i-1][p]==y or a[i-1][p]==w){
                    dp[i][j]+=dp[i-1][p];
                    dp[i][j]%=mod;
                }
            }
        }
    }
    int ans=0;
    for(int i=1;i<=k;i++){
        ans+=dp[n][i];
        ans%=mod;
    }
    cout<<ans;
}

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