Submission #735069

#	Time	Username	Problem	Language	Result	Execution time	Memory
735069		MisterReaper	Trener (COCI20_trener)	C++17	0 / 110	12 ms	1724 KiB

trener

// author: MisterReaper (Ahmet Alp Orakci)
#include <bits/stdc++.h>
using namespace std;
#define int long long

const int MOD = 1e9 + 7;

#define ONLINE_JUDGE
#ifndef ONLINE_JUDGE
    #include "debug.h"
    #define OPEN freopen(".in", "r", stdin); freopen(".out", "w", stdout);
    #define TIME cerr << "\n" << fixed << setprecision(2) << 1000.0 * clock() / CLOCKS_PER_SEC << " milliseconds ";
#else
    #define debug(...) void(23)
    #define OPEN void(0000)
    #define TIME void(232323233)
#endif

void solve()
{
    int n, k; cin >> n >> k;
    vector <vector <string>> arr(n, vector <string> (k));
    for(int i = 0; i < n; i++)
        for(int j = 0; j < k; j++) 
            cin >> arr[i][j];

    map <string, int> mp;
    mp[""] = 1;

    for(int i = 0; i < n; i++)
    {
        for(int j = 0; j < k; j++)
        {
            string f = "", s = arr[i][j];
            for(int x = 1; x < i +1; x++) f += arr[i][j][x];
            s.pop_back();

            mp[arr[i][j]] += mp[f];
            mp[arr[i][j]] %= MOD;
            if(f != s) mp[arr[i][j]] += mp[s];
            mp[arr[i][j]] %= MOD;
        }
    }

    int ans = 0;
    for(int i = 0; i < k; i++)
    {
        ans += mp[arr[n -1][i]];
        ans %= MOD;
    }

    cout << ans;
    
    return;
}

int32_t main()
{
    OPEN;

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

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

    TIME;

    return 0;
}

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