Minefield

You are a member of the mine sweeper squad. Your job is to find sweep clean an area of any mines, without getting yourself killed in the process. To help in your job, the area is divided into equal size sqyare grids you are equipped with some weird mine detector devices. The weird thing about these detectors is, if you put it in a grid square, it will send signals around it but it will not detect whether there are mines in all adjacent squares, instead it will tell you how many mines are in adjacent area of the adjacent squares. To add to the weirdness, if you place a detector in a square already under detection, it won't work. The implication of this strange detection method is that: - you will have to go blindly into one of undetected squares by pointing on that square with your mouse and click the left button and hope that you are in good luck. - from the numbers shown in detection area, you should be able to tell where the mines actually are; you can mark them by pointing your mouse at those squares and press spacebar for example 1 1 1 means that there is definitely 1 mine next to that corner, so you can mark it like this: 1 1 1 ? good luck on cleaning all mines!