方法
S1
S2
S3
1
3, 1, 1, 1, 1; 6, 3, 3, 3, 3
3, 1, 1, 1, 1, 1; 6, 3, 3, 3, 3, 3
3, 1, 1, 1, 1, 1
2
3, 4; 6, 12
3, 1, 4; 6, 3, 12
3, 1, 4