100 Day Summer Challenge

100 problems in 100 days. #100problems

Day 70

70 of 100: Mini-Minesweeper

The grid shown has some squares that contain mines and some that are safe; every square with a number is safe. In addition, the numbers indicate how many of the adjacent squares (vertically, horizontally, or diagonally) have mines.

How many mines are there on the grid?

Each square contains at most one mine. Be logical! You don't need to guess.

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