Kluci found an old minefield plan, see the picture. The numbers are on the fields where there are no mines, and they indicate the number of adjacent mined fields. Determine how many mines there are in the field and where they are. (Fields are adjacent if they share a vertex or a side.)

| 1 |  | 2 |  | 2 |
| :--- | :--- | :--- | :--- | :--- |
|  | 3 |  | 3 |  |
| 3 |  |  |  | 3 |
|  | 2 |  |  |  |
|  |  |  | 2 |  |
We can start unambiguously filling in the plan from the cell with the number $3 \mathrm{v}$ in the first column or from the cell with the number $2 \mathrm{v}$ in the upper right corner. In both cases, all unmarked adjacent cells must contain mines (marked as 丸):

| 1 |  | 2 | $\star$ | 2 |
| :---: | :---: | :---: | :---: | :---: |
| $\star$ | 3 |  | 3 | $\star$ |
| 3 | $\star$ |  |  | 3 |
| $\star$ | 2 |  |  |  |
|  |  |  | 2 |  |

Then we can fill in all other cells, for example, in the following way:

| 1 | - | 2 | $\star$ | 2 |
| :---: | :---: | :---: | :---: | :---: |
| $\star$ | 3 |  | 3 | $\star$ |
| 3 | $\star$ |  |  | 3 |
| $\star$ | 2 |  |  |  |
| - | - | - | 2 |  |


| 1 | - | 2 | $\star$ | 2 |
| :---: | :---: | :---: | :---: | :---: |
| $\star$ | 3 |  | 3 | $\star$ |
| 3 | $\star$ | - |  | 3 |
| $\star$ | 2 | - |  |  |
| - | - | - | 2 |  |


| 1 | - | 2 | $\star$ | 2 |
| :---: | :---: | :---: | :---: | :---: |
| $\star$ | 3 | $\star$ | 3 | $\star$ |
| 3 | $\star$ | - |  | 3 |
| $\star$ | 2 | - |  |  |
| - | - | - | 2 |  |


| 1 | - | 2 | $\star$ | 2 |
| :---: | :---: | :---: | :---: | :---: |
| $\star$ | 3 | $\star$ | 3 | $\star$ |
| 3 | $\star$ | - | - | 3 |
| $\star$ | 2 | - |  |  |
| - | - | - | 2 |  |


| 1 | - | 2 | $\star$ | 2 |
| :---: | :---: | :---: | :---: | :---: |
| $\star$ | 3 | $\star$ | 3 | $\star$ |
| 3 | $\star$ | - | - | 3 |
| $\star$ | 2 | - | $\star$ | $\star$ |
| - | - | - | 2 |  |


| 1 | - | 2 | $\star$ | 2 |
| :---: | :---: | :---: | :---: | :---: |
| $\star$ | 3 | $\star$ | 3 | $\star$ |
| 3 | $\star$ | - | - | 3 |
| $\star$ | 2 | - | $\star$ | $\star$ |
| - | - | - | 2 | - |

There are a total of 8 mines on the plan, their placement is highlighted in the following image:

|  |  |  | $\star$ |  |
| :--- | :--- | :--- | :--- | :--- |
| $\star$ |  | $\star$ |  | $\star$ |
|  | $\star$ |  |  |  |
| $\star$ |  |  | $\star$ | $\star$ |
|  |  |  |  |  |