100 Floors - Level 56

Minesweeper! You might need to be of a certain age to recognize this game that used to come bundled with Windows back in "the day". (Hm, I see now that it's still there, just hidden amidst many other programs.) The idea of Minesweeper was to identify bombs on a blank grid by noting the numbered squares, which told you how many bombs were surrounding each number. You then ID'd a bomb square by planting a flag. But here, the flag are already planted...

It's sort of a reverse Minesweeper. You have to look at how many flags are around each number and change the number to match the number of flags. For example, the number that starts out as "1" needs to become a 4 because there are four flags around it: left, right, below, and lower right. You'll end up with a 2, a 3, two 4s and two 5s.