Submission #529

#	Time	Username	Problem	Language	Result	Execution time	Memory
529		kriii	지도 색칠하기 (GA3_map)	C++98	0 / 120	8 ms	18324 KiB

map

bool P[1<<20];
int S[2][1<<20],con[20]; long long mul[1<<20];

long long pos(int v)
{
	int c = -1;
	while (v){
		v /= 2;
		c++;
	}
	return c;
}

long long NumberOfMaps (int N, int M, int *A, int *B)
{
	long long ret = 0;


	int i,j,u,x,s1,s2,t;

	for (i=0;i<M;i++){
		A[i]--; B[i]--;
		con[A[i]] |= 1 << B[i];
		con[B[i]] |= 1 << A[i];
	}

	P[0] = 1; mul[0] = 1;
	for (i=1;i<(1<<N);i++){
		u = i & (-i);
		if (!P[i-u]) continue;
		P[i] = 1;

		x = pos(u);
		s1 = S[0][i-u] & con[x];
		s2 = S[1][i-u] & con[x];

		if (s1 != 0 && s2 != 0) continue;
		if (s1 == 0 && s2 == 0) mul[i] = mul[i-u] * 2;
		else mul[i] = mul[i-u];
		S[0][i] = S[0][i-u];
		S[1][i] = S[1][i-u];
		if (s1 == 0) S[0][i] |= u;
		else if (s2 == 0) S[1][i] |= u;
	}

	for (i=0;i<(1<<N);i++){
		j = (1<<N)-1 -i;
		ret += mul[i] * mul[j];
	}

	return ret;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 25
• Subtask 4: 0 / 30
• Subtask 5: 0 / 35