希丰展？使MD
```python
m, t, s = *map(int, input().split()),
if t == 0: print(0) # 0不能作除数
else: print(max(0, m - s//t - s%t))
```
by ww23 @ 2023-10-29 11:20:22
@[ww23](/user/526705) 是的，写复杂了，谢谢你
by lige121 @ 2023-10-29 11:35:02