Winter

Time Limit	Memory Limit	Input File	Output File
1 second	256 MiB	`Standard Input`	`Standard Output`

Problem info

- Subtask 1 (20 points) has 16 cases.
- Subtask 2 (20 points) has 9 cases.
- Subtask 3 (35 points) has 22 cases.
- Subtask 4 (25 points) has 38 cases.