Cod sursa(job #466038)

Utilizator Mishu91Andrei Misarca Mishu91 Data 25 iunie 2010 19:47:13
Problema Ratphu Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.8 kb
#include <fstream>
#include <cassert>

using namespace std;

const int MAX_P = 20;
const int MAX_N = (1 << 18);

ifstream fin ("ratphu.in");
ofstream fout ("ratphu.out");

long long N, R[MAX_N][MAX_P];
int P, Ncf;
char cif[MAX_P];

void trans(long long N) {
	for(; N; N /= 10) {
		cif[Ncf++] = N % 10;
	}
}

int main() {
	fin >> N >> P;
	trans(N);
	R[0][0] = 1;
	assert(N > 0);
	
	for(int conf = 1; conf < (1 << Ncf); ++conf) {
		int nr = 0, aux = conf;
		for(int i = 0; i < Ncf; ++i) {
			if(aux & 1) {
				++nr;
			}

			aux >>= 1;
		}

		aux = conf;
		for(int i = 0; i < Ncf; ++i) {
			for(int r = 0; r < P; ++r) {
				int newc = conf ^ (1 << i);
				if(aux & 1) {
					int newr = (r*10 + cif[i]) % P;
					R[conf][newr] += R[newc][r];
				}             
			}

			aux >>= 1;
		}
	}

	fout << R[(1 << Ncf)-1][0];   
}