Submission #845252

#	Time	Username	Problem	Language	Result	Execution time	Memory
845252		vjudge1	Trener (COCI20_trener)	C++17	22 / 110	6 ms	1628 KiB

trener

#pragma GCC optimize("unroll-loops,Ofast,O3")
#include <bits/stdc++.h>

#define pb push_back
#define mp make_pair
#define spc << " " <<
#define all(x) x.begin(), x.end()
#define ll long long
#define int long long
#define ii pair<int,int>
#define vi vector<int>
#define vii vector<ii>
#define st first
#define nd second
#define inf 1000000009
#define MOD 1000000007

using namespace std;





void solve(){
    int n,k; cin >> n >> k;
    string arr[n+1][k+1];
    for(int i=1; i<=n; i++){
        for(int j=1; j<=k; j++) cin >> arr[i][j];
    }
    map<string, int> see;
    for(int L=n; L>=2; L--){
        for(int i=1; i<=k; i++){
            string s=arr[L][i];
            if(L==n) see[s]=1;
            see[s.substr(0, L-1)]+=see[s];
            if(s.substr(0, L-1) != s.substr(1, L-1))see[s.substr(1, L-1)]+=see[s];
            //cerr << s spc "to" spc s.substr(0, L-1) spc s.substr(1, L-1) spc see[s] << endl;
        }
    }
    int ans=0;
    for(int i=1; i<=k; i++){
        //cerr << arr[1][i] spc see[arr[1][i]] << endl;
        ans+=see[arr[1][i]];
    }
    cout << ans << endl;
}



signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);
    #ifdef Local
    freopen("in.txt","r",stdin);
    freopen("out","w",stdout);
    #endif
    

    ll t=1;
    //cin >> t;
    while(t--) solve();
}

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