oj.uz

Submission #845196

# Submission time Handle Problem Language Result Execution time Memory
845196 2023-09-06T12:32:31 Z vjudge1 Trener (COCI20_trener) C++17
0 / 110
 2000 ms 5212 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
using namespace std;
#define int long long
 
const int MOD = 1e9 + 7;

#ifndef ONLINE_JUDGE
    #define OPEN freopen(".in", "r", stdin); \
                 freopen(".out", "w", stdout);
#else
    #define OPEN void(23);
#endif

string arr[55][105];
int dp[55][105][105];

bool check(string &a, string &b)
{
    int n = b.size(); 
    bool ok = true;
    for(int i = 1; i <= n -1; i++)
    {
        ok &= a[i -1] == b[i -1];
    }
    
    if(ok) return true;

    ok = true;
    for(int i = 2; i <= n; i++)
    {
        ok &= a[i -2] == b[i -1];
    }

    return ok;
}

void solve()
{
    memset(dp, -1, sizeof dp);
    int n, k; cin >> n >> k;
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= k; j++)
            cin >> arr[i][j];

    function <int(int, int, int)> f = [&](int x, int bef, int nw) -> int
    {
        if(x == n) return check(arr[x -1][bef], arr[x][nw]);
        int &it = dp[x][bef][nw];
        if(it != -1) return it;

        if(!check(arr[x -1][bef], arr[x][nw])) return it = 0;
        //cerr << x << " " << bef << " " << nw << "\n";
        int res = 0;
        for(int i = 1; i <= k; i++)
        {
            int calc = f(x +1, nw, i);
            res = (res + calc) % MOD;
        }

        return it = res;
    };

    int cev = 0;
    for(int i = 1; i <= k; i++) 
        cev = (cev + f(1, 0, i)) % MOD;

    cout << cev;

    return;
}

int32_t main()
{
    OPEN;

    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);

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

Compilation message

trener.cpp: In function 'int32_t main()':
trener.cpp:10:25: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     #define OPEN freopen(".in", "r", stdin); \
      |                  ~~~~~~~^~~~~~~~~~~~~~~~~~~
trener.cpp:76:5: note: in expansion of macro 'OPEN'
   76 |     OPEN;
      |     ^~~~
trener.cpp:11:25: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |                  freopen(".out", "w", stdout);
      |                  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
trener.cpp:76:5: note: in expansion of macro 'OPEN'
   76 |     OPEN;
      |     ^~~~

Subtask #1
0 / 22.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2013 ms 5212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 33.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2061 ms 5212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 55.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2013 ms 5212 KB Time limit exceeded
2 Halted 0 ms 0 KB -