modified:   .idea/modules.xml
	modified:   app/app.iml
	modified:   app/src/main/java/com/example/xiangyi/sudoku1/Game.java
	new file:   app/src/main/java/com/example/xiangyi/sudoku1/KeypadView.java
	modified:   app/src/main/java/com/example/xiangyi/sudoku1/PuzzleView.java
	modified:   app/src/main/java/com/example/xiangyi/sudoku1/SudokuSolver.java
	modified:   app/src/main/res/layout/game.xml
	modified:   app/src/main/res/values/colors.xml
	modified:   app/src/main/res/values/strings.xml