Submission #238739

#	Time	Username	Problem	Language	Result	Execution time	Memory
238739		akat	Trener (COCI20_trener)	C++14	110 / 110	268 ms	18296 KiB

trener

    #include<bits/stdc++.h>
    using namespace std;
    map<string,int>h;
    const int MOD = 1e9 + 7;
    int main()
    {
      	ios_base::sync_with_stdio(0);
       	cin.tie(0);
       	long long n,k,i,j,curr,ans = 0;
       	string s,sub1,sub2;
       	cin>>n>>k;
       	for(i = 0; i < n; i++)
       		for(j = 0; j < k; j++)
       		{
       			cin>>s;
       			sub1 = s.substr(0,i);
       			sub2 = s.substr(1,i);
       			curr = h[sub1];;
       			if(sub1 != sub2) curr += h[sub2];
       			if(curr >= MOD) curr -= MOD;
       			if(i==0) curr++;
       			h[s] += curr;
    			if(h[s] >= MOD) h[s] -= MOD;
       			if(i == n-1) ans += curr;
       			if(ans >= MOD) ans -= MOD;
       		}
       	cout<<ans<<'\n';
    }

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