Cod sursa(job #466028)

Utilizator Mishu91Andrei Misarca Mishu91 Data 25 iunie 2010 19:09:12
Problema Ratphu Scor 70
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.87 kb
#include <fstream>

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_P][MAX_N];
int P, Ncf;
char cif[MAX_P];
long long pow10[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;

	pow10[0] = 1;
	for(int i = 1; i <= 18; ++i)
		pow10[i] = pow10[i-1] * 10;

	for(int conf = 1; conf < (1 << Ncf); ++conf) {
		int nr = 0;
		for(int i = 0; i < Ncf; ++i) {
			if(conf & (1 << i)) {
				++nr;
			}
		}

		for(int r = 0; r < P; ++r) {
			for(int i = 0; i < Ncf; ++i) {
				if(R[r][conf ^ (1 << i)] == 0) continue;
				if(conf & (1 << i)) {
					int actr = pow10[nr-1]*cif[i] % P;
					int newr = (actr + r) % P;
					R[newr][conf] += R[r][conf ^ (1 << i)];
				}
			}
		}
	}

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