#include using namespace std; typedef long long LL; int x[4] = {1, 2, 3, 4}; const int N = 110; int a[N][4]; int size; //填充一个全排列二维数组 void fill_qpl() { do { a[size][0] = x[0], a[size][1] = x[1], a[size][2] = x[2], a[size++][3] = x[3]; } while (next_permutation(x, x + 4)); } int bucket[5]; bool check(int a[4], int b[4], int c[4], int d[4]) { //左上 memset(bucket, 0, sizeof bucket); bucket[a[0]]++, bucket[a[1]]++, bucket[b[0]]++, bucket[b[1]]++; for (int i = 1; i <= 4; i++)if (bucket[i] != 1) return false; //右上 memset(bucket, 0, sizeof bucket); bucket[a[2]]++, bucket[a[3]]++, bucket[b[2]]++, bucket[b[3]]++; for (int i = 1; i <= 4; i++)if (bucket[i] != 1) return false; //左下 memset(bucket, 0, sizeof bucket); bucket[c[0]]++, bucket[c[1]]++, bucket[d[0]]++, bucket[d[1]]++; for (int i = 1; i <= 4; i++)if (bucket[i] != 1) return false; //右下 memset(bucket, 0, sizeof bucket); bucket[c[2]]++, bucket[c[3]]++, bucket[d[2]]++, bucket[d[3]]++; for (int i = 1; i <= 4; i++)if (bucket[i] != 1) return false; //竖着也需要检查噢~ for (int k = 0; k < 4; k++) { memset(bucket, 0, sizeof bucket); bucket[a[k]]++, bucket[b[k]]++, bucket[c[k]]++, bucket[d[k]]++; for (int i = 1; i <= 4; i++)if (bucket[i] != 1) return false; } return true; } int cnt; int main() { //填充 fill_qpl(); for (int i = 0; i < size; i++) for (int j = 0; j < size; j++) for (int k = 0; k < size; k++) for (int p = 0; p < size; p++) { //四行数据 //a[i],a[j],a[k],a[p] 是否可以构成数独? //构建的矩阵,切割成四块,每块用桶的思路看看是不是满足1,2,3,4分布 if (i == j || i == k || i == p || j == k || j == p || k == p) continue; if (check(a[i], a[j], a[k], a[p])) { //输出 for (int m = 0; m < 4; m++) cout << a[i][m] << " "; cout << endl; for (int m = 0; m < 4; m++) cout << a[j][m] << " "; cout << endl; for (int m = 0; m < 4; m++) cout << a[k][m] << " "; cout << endl; for (int m = 0; m < 4; m++) cout << a[p][m] << " "; cout << endl; cout << endl; //计数 cnt++; } } cout << cnt << endl; return 0; }