oj.uz

답안 #845192

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
845192 2023-09-06T12:31:58 Z vjudge1 Trener (COCI20_trener) C++17
0 / 110
 81 ms 524288 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;

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

string arr[55][1505];
int dp[55][1505][1505];

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();
    }
}

Subtask #1
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 81 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 64 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 81 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -