public static boolean canWin(int leap, int[] game) {
    // Return true if you can win the game; otherwise, return false.
    return canWinHelper(0, leap, game);
}

static boolean canWinHelper(int currentIndex, int leap, int[] game) {
    if( currentIndex >= game.length || game[currentIndex]==1 ){
        return false;
    }
    if (currentIndex == game.length - 1 || currentIndex + leap >= game.length) {
        return true;
    }
    game[currentIndex] = 1; 
    boolean canWinFromNext = canWinHelper(currentIndex + 1, leap, game);
    boolean canWinFromBack = (currentIndex - 1 >= 0) && canWinHelper(currentIndex - 1, leap, game);
    boolean canWinFromLeap = canWinHelper(currentIndex + leap, leap, game);
    game[currentIndex] = 0; 
    return canWinFromNext || canWinFromBack || canWinFromLeap;
}