Cod sursa(job #2135203)

Utilizator sabinandreiBocan Sabin Andrei sabinandrei Data 18 februarie 2018 18:03:03
Problema Pedefe Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 2 kb
#include <cstring>
#include <fstream>
#include <algorithm>
 
using namespace std;
 
const int MOD = 666013;
 
int N, M, P;
int A[502], B[502], C[102];
int D[2][502][502];
int AIB[502], S[502];
 
void update(int pos, int val)
{
    ++pos;
    for (; pos <= 501; pos += pos & -pos)
    {
        AIB[pos] += val;
        if (AIB[pos] >= MOD) AIB[pos] -= MOD;
    }
}
int query(int pos)
{
    ++pos;
 
    int sum = 0;
    for (; pos >= 1; pos -= pos & -pos)
    {
        sum += AIB[pos];
        if (sum >= MOD) sum -= MOD;
    }
    return sum;
}
 
int main()
{
    ifstream fin("pedefe.in");
    ofstream fout("pedefe.out");
 
    fin >> N >> M >> P;
    for (int i = 1; i <= N; ++i)
        fin >> A[i];
    for (int i = 1; i <= M; ++i)
        fin >> B[i];
    for (int i = 1; i <= P; ++i)
        fin >> C[i];
 
    int act = 0;
 
    D[act][0][0] = 1;
    for (int k = 0; k <= P; ++k)
    {
        if (k != 0) act = !act;
 
        memset(S, 0, sizeof(S));
        for (int i = 1; i <= N; ++i)
        {
            memset(AIB, 0, sizeof(AIB));
            if (k == 0) update(0, 1);
 
            for (int j = 1; j <= M; ++j)
            {
                D[!act][i][j] = 0;
                if (A[i] == B[j])
                {
                    int resultnow = query(B[j]);
                    if (k < P && A[i] == C[k + 1])
                        D[!act][i][j] += resultnow;
                    else
                        D[act][i][j] += resultnow;
                }
                else
                    D[act][i][j] = 0;
 
                update(B[j], S[j]);
                S[j] += D[act][i][j];
                if (S[j] >= MOD) S[j] -= MOD;
            }
        }
    }
 
    int result = 0;
    for (int i = 1; i <= N; ++i)
        for (int j = 1; j <= M; ++j)
        {
            result += D[act][i][j];
            if (result >= MOD) result -= MOD;
        }
    fout << result << '\n';
 
    fin.close();
    fout.close();
}