Cod sursa(job #2315713)

Utilizator stefaneduardDeaconu Stefan-Eduard stefaneduard Data 10 ianuarie 2019 14:28:23
Problema Cowfood Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.61 kb
#include <iostream>
#include <fstream>
using namespace std;
 
ifstream f("cowfood.in");
ofstream g("cowfood.out");
 
const int NMAX = 21, KMAX = 31, SMAX = 10001;
const int MOD = 3210121;
 
int K, S, N, V, E;
int M[NMAX][KMAX], x[NMAX], MAX[NMAX][KMAX], SCOMB[SMAX];
 
void calcSumComb()
{
    for(int i = 0; i <= S; i++)
        SCOMB[i] = 1;
    for(int i = 1; i <= K; i++)
        for(int j = 1; j <= S; j++)
        {
            SCOMB[j] += SCOMB[j - 1];
            SCOMB[j]  %= MOD;
        }
}
 
void genSubm(int n, int m)
{
    int semn, k = 1, i;
    x[1] = 0;
    if(m % 2 == 0) semn = -1;
    else semn = 1;
    while(k > 0)
        if(x[k] < n - m + k)
        {
            x[k]++;
            for(i = 1; i <= K; i++)
                MAX[k][i] = max(MAX[k - 1][i], M[x[k]][i]);
            if(k == m)
            {
                int sum = 0;
                for(i = 1; i <= K; i++)
                    sum += MAX[m][i];
                if(sum <= S)
                {
                    E += semn * SCOMB[S - sum];
                    E %= MOD;
                }
            }
            else
            {
                k++;
                x[k] = x[k - 1];
            }
        }
        else
            k--;
}
 
int main()
{
    f >> K >> S >> N;
    calcSumComb();
    for(int i = 1; i <= N; i++)
        for(int j = 1; j <= K; j++)
            f >> M[i][j];
    E = 0;
    for(int i = 1; i <= N; i++)
        genSubm(N, i);
    V = SCOMB[S] - S * K - 1 - E;
    V %= MOD;
    if(V < 0)V += MOD;
    g << V;
    f.close();
    g.close();
    return 0;
}